129-397: The Iyonix PC was an Acorn -clone personal computer sold by Castle Technology and Iyonix Ltd between 2002 and 2008. According to news site Slashdot , it was the first personal computer to use Intel's XScale processor. It ran RISC OS 5 . The Iyonix originated as a secret project by Pace engineers in connection with development of set-top boxes (STBs), and has been noted as
258-526: A $ 45 million contract to produce the BBC Micro for the US market. During the search for potential financing partners, an Olivetti director had approached Close Brothers, ostensibly as part of Olivetti's strategy of acquiring technologically advanced small companies. After a short period of negotiations, Curry and Hauser signed an agreement with Olivetti on 20 February. With the founders relinquishing control of
387-704: A BBC Micro with a 6502 second processor. It convinced the Acorn engineers that they were on the right track. Before they could go any further, however, they would need more resources. It was time for Wilson to approach Hauser and explain what was afoot. Once the go-ahead had been given, a small team was put together to implement Wilson's model in hardware. Acorn initiated its RISC research project in October 1983, and by 1987 had spent £5 million . VLSI Technology, Inc were chosen as silicon partner, since they already supplied Acorn with ROMs and some custom chips. VLSI produced
516-901: A cellular network architecture, and therefore mobile telephones are called cellphones (or "cell phones") in North America. In addition to telephony , digital mobile phones support a variety of other services , such as text messaging , multimedia messaging , email , Internet access (via LTE , 5G NR or Wi-Fi ), short-range wireless communications ( infrared , Bluetooth ), satellite access ( navigation , messaging connectivity ), business applications, payments (via NFC ), multimedia playback and streaming ( radio , television ), digital photography , and video games . Mobile phones offering only basic capabilities are known as feature phones ( slang : "dumbphones" ); mobile phones that offer greatly advanced computing capabilities are referred to as smartphones . The first handheld mobile phone
645-599: A fruit machine for Ace Coin Equipment (ACE) of Wales . The ACE project was started at office space obtained at 4a Market Hill in Cambridge. Initially, the ACE controller was based on a National Semiconductor SC/MP microprocessor, but soon the switch to a MOS Technology 6502 was made. CPU had financed the development of a SC/MP based microcomputer system using the income from its design-and-build consultancy. This system
774-512: A 2–4 MHz 6502-based system doing the graphics. Acorn would need a new architecture. Acorn had investigated all of the readily available processors and found them wanting or unavailable to them. After testing all of the available processors and finding them lacking, Acorn decided that it needed a new architecture. Inspired by white papers on the Berkeley RISC project, Acorn seriously considered designing its own processor. A visit to
903-400: A basic mobile phone, which is only capable of voice calling and text messaging. Feature phones and basic mobile phones tend to use a proprietary, custom-designed software and user interface . By contrast, smartphones generally use a mobile operating system that often shares common traits across devices. The critical advantage that modern cellular networks have over predecessor systems is
1032-497: A business machine looked like a good idea to Acorn. A development programme was started to create a business computer using Acorn's existing technology: the BBC Micro mainboard, the Tube and second processors to give CP/M , MS-DOS and Unix ( Xenix ) workstations. This Acorn Business Computer (ABC) plan required a number of second processors to be made to work with the BBC Micro platform. In developing these, Acorn had to implement
1161-476: A close relationship with Torch Computers in the early 1980s, Acorn sought to acquire Torch in 1984 with the intention of making Torch "effectively the business arm" of Acorn, despite a lack of clarity about competing product lines and uncertainty about the future of Acorn's still-unreleased business machine within any rationalised product range, although this acquisition was never completed, with Torch having pulled out as Acorn's situation deteriorated. At around
1290-434: A customer unit could use. A cellular network mobile phone system gets its name from dividing the service area into many small cells, each with a base station with (for example) a useful range on the order of a kilometer (mile). These systems have dozens or hundreds of possible channels allocated to them. When a subscriber is using a given channel for a telephone connection, that frequency is unavailable for other customers in
1419-752: A disappointing summer season in 1984, Acorn had evidently focused on making up for lost sales over the Christmas season, with the Electron being a particular focus. However, a refusal to discount the BBC Micro also appeared to inhibit sales of that machine, with some dealers expressing dissatisfaction to the point of considering abandoning the range altogether. With rumours of another, potentially cheaper, machine coming from Acorn, dealers eventually started to discount heavily after Christmas. For instance, high street retailer Rumbelows sought to clear unsold Christmas stocks of around 1500 machines priced at £299, offering
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#17327828110711548-494: A discount of around £100, also bundling them with a cassette recorder and software. The rumoured machine turned out to be the BBC Model B+ which was a relatively conservative upgrade and more, not less, expensive than the machine it replaced. It was speculated that the perception of a more competitive machine soon to be launched might well have kept potential purchasers away from the products that Acorn needed to sell. Acorn
1677-424: A drawn-out and expensive process that proved futile: all of the expansion devices that were intended to be sold with the BBC Micro had to be tested and radiation emissions had to be reduced. It was claimed that Acorn spent £10 million on its US operation without this localised variant of the BBC Micro establishing a significant market share. The machine, however, did make an appearance in the school of Supergirl in
1806-484: A failure to consider local market conditions and preferences, with "complex technical efforts" having been made to make the machine compatible with US television standards when local market information would have indicated that "US home computer users expect to use a dedicated personal computer monitor". Consequently, obtaining Federal approval for the BBC Micro in order to expand into the United States proved to be
1935-418: A few sets of radio channels (frequencies). Once these few channels were in use by customers, no further customers could be served until another user vacated a channel. It would be impractical to give every customer a unique channel since there would not be enough bandwidth allocated to the mobile service. As well, technical limitations such as antenna efficiency and receiver design limit the range of frequencies
2064-640: A follow-up to an ITV documentary , The Mighty Micro , in which Dr Christopher Evans from the UK National Physical Laboratory predicted the coming microcomputer revolution . It was a very influential documentary—so much so that questions were asked in Parliament . As a result of these questions, the Department of Industry (DoI) became interested in the programme, as did BBC Enterprises , which saw an opportunity to sell
2193-676: A larger case with a second drive. The System 5 was largely similar to the System 4, but included a newer 2 MHz version of the 6502 . Development of the Sinclair ZX80 started at Science of Cambridge in May 1979. Learning of this probably prompted Curry to conceive the Atom project to target the consumer market. Curry and another designer, Nick Toop, worked from Curry's home in the Fens on
2322-562: A machine to go with the series. BBC Engineering was instructed to draw up an objective specification for a computer to accompany the series. Eventually, under some pressure from the DoI to choose a British system, the BBC chose the NewBrain from Newbury Laboratories. This selection revealed the extent of the pressure brought to bear on the supposedly independent BBC's computer literacy project—Newbury
2451-442: A market capitalisation of about £135 million. CPU founders Hermann Hauser and Chris Curry's stakes in the new company were worth £64m and £51m, respectively. Ten per cent of the equity was placed on the market, with the money raised from the flotation "mainly" directed towards establishing US and German subsidiaries (the flotation raising around £13.4 million ), although some was directed towards research and product development. By
2580-523: A mobile device, such as a smartphone. The term "app" is a shortening of the term "software application". A common data application on mobile phones is Short Message Service (SMS) text messaging. The first SMS message was sent from a computer to a mobile phone in 1992 in the UK while the first person-to-person SMS from phone to phone was sent in Finland in 1993. The first mobile news service, delivered via SMS,
2709-498: A new multi-tasking OS, four internal ROM sockets, and shipped with a software suite based on View and ViewSheet. It also had an attached telephone, communications software and auto-answer/auto-dial modem. However, with Acorn's finances having sustained the development cost of the Archimedes, and with the custom systems division having contributed substantially to the company's losses in 1987, a change in strategy took effect towards
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#17327828110712838-476: A number of computers during the 1980s with associated software that were highly popular in the domestic market, and they have been historically influential in the development of computer technology like processors . The company's Acorn Electron , released in 1983, and the later Acorn Archimedes , were highly popular in Britain, while Acorn's BBC Micro computer dominated the educational computer market during
2967-401: A number of distinguishing features. The International Telecommunication Union measures those with Internet connection, which it calls Active Mobile-Broadband subscriptions (which includes tablets, etc.). In the developed world, smartphones have now overtaken the usage of earlier mobile systems. However, in the developing world, they account for around 50% of mobile telephony . Feature phone
3096-501: A problem due to the design of the phone, the quality of the cellular network and compression algorithms used in long-distance calls . Audio quality can be improved using a VoIP application over WiFi . Cellphones have small speakers so that the user can use a speakerphone feature and talk to a person on the phone without holding it to their ear. The small speakers can also be used to listen to digital audio files of music or speech or watch videos with an audio component, without holding
3225-606: A proprietary local area network had been installed at Market Hill. It was decided to include this, the Econet , in the Atom, and at its launch at a computer show in March 1980, eight networked Atoms were demonstrated with functions that allowed files to be shared, screens to be remotely viewed and keyboards to be remotely slaved. After the Atom had been released into the market, Acorn contemplated building modern 16-bit processors to replace
3354-420: A relatively low-cost Ethernet interface card utilising Intel's 82586 network controller chip. Torus later released a network management solution called Tapestry, based on Icon and marketed by IBM for its own networking technologies. Torus also released support for the use of Novell's Advanced Netware product on its own networking hardware. The company eventually entered receivership in 1990 with Acorn reporting
3483-464: A single hand, since most thumbs cannot reach the entire screen surface; they may need to be shifted around in the hand, held in one hand and manipulated by the other, or used in place with both hands. Due to design advances, some modern smartphones with large screen sizes and "edge-to-edge" designs have compact builds that improve their ergonomics, while the shift to taller aspect ratios have resulted in phones that have larger screen sizes whilst maintaining
3612-517: A single platform. There are a huge variety of apps, including video games , music products and business tools. Up until that point, smartphone application distribution depended on third-party sources providing applications for multiple platforms, such as GetJar , Handango , Handmark , and PocketGear . Following the success of the App Store, other smartphone manufacturers launched application stores, such as Google's Android Market (later renamed to
3741-429: A small microchip called a Subscriber Identity Module or SIM card , in order to function. The SIM card is approximately the size of a small postage stamp and is usually placed underneath the battery in the rear of the unit. The SIM securely stores the service-subscriber key (IMSI) and the K i used to identify and authenticate the user of the mobile phone. The SIM card allows users to change phones by simply removing
3870-659: A standard for an educational microcomputer system analogous to the MSX computing architecture and to the established IBM PC compatible architecture. Deliberations continued into 1986, with Acorn proposing its own ARM processor architecture as the basis for the initiative, whereas Thomson had proposed the Motorola 68000. Expectations that Olivetti would actively market Acorn's machines in Europe were, however, frustrated by Olivetti's own assessment of Acorn's products as "too expensive" and
3999-514: A successor to the RiscPC . Pace had a licence to develop RISCOS Ltd 's OS sources for use in the STB market. The Iyonix was developed under the code name Tungsten and uses RISC OS 5 , which is a version of RISC OS that supports ARM CPUs with 32-bit addressing modes. The sources and hardware design were subsequently acquired by Castle, who developed them into the final product. Castle continued to keep
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4128-471: A telephone service area, which is divided up into 'cells'. Each cell uses a different set of frequencies from neighboring cells, and will typically be covered by three towers placed at different locations. The cell towers are usually interconnected to each other and the phone network and the internet by wired connections. Due to bandwidth limitations each cell will have a maximum number of cell phones it can handle at once. The cells are therefore sized depending on
4257-469: A very thin carbon microphone". Early predecessors of cellular phones included analog radio communications from ships and trains. The race to create truly portable telephone devices began after World War II, with developments taking place in many countries. The advances in mobile telephony have been traced in successive "generations", starting with the early zeroth-generation ( 0G ) services, such as Bell System 's Mobile Telephone Service and its successor,
4386-724: A £242,000 loss associated with the investment. Such were the ambitions of Acorn's management that a joint venture company was established in Hong Kong under the name Optical Information Systems , apparently engaging in the development of "digital, optical technology for computer data storage". Involving a Hong Kong turntable manufacturer, Better Sound Reproduction Ltd., Acorn were to set up a research and development facility in Palo Alto, California, US to bring "compact laser disk drives designed as floppy disk drive replacements" to market within 18 months. In February 1985, speculation about
4515-419: Is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as opposed to a fixed-location phone ( landline phone ). The radio frequency link establishes a connection to the switching systems of a mobile phone operator , which provides access to the public switched telephone network (PSTN). Modern mobile telephone services use
4644-412: Is a term typically used as a retronym to describe mobile phones which are limited in capabilities in contrast to a modern smartphone . Feature phones typically provide voice calling and text messaging functionality, in addition to basic multimedia and Internet capabilities, and other services offered by the user's wireless service provider . A feature phone has additional functions over and above
4773-513: Is being used or not) using a technique known as multilateration to calculate the differences in time for a signal to travel from the mobile phone to each of several cell towers near the owner of the phone. The movements of a mobile phone user can be tracked by their service provider and, if desired, by law enforcement agencies and their governments. Both the SIM card and the handset can be tracked. China has proposed using this technology to track
4902-496: Is sometimes referred to as the "British Apple " and has been compared to Fairchild Semiconductor for being a catalyst for start-ups. On 25 July 1961, Clive Sinclair founded Sinclair Radionics to develop and sell electronic devices such as calculators . The failure of the Black Watch wristwatch and the calculator market's move from LEDs to LCDs led to financial problems, and Sinclair approached government body
5031-468: The 5G NR (5G New Radio) standard. 5G can be implemented in low-band, mid-band or high-band millimeter-wave, with download speeds that can achieve gigabit-per-second (Gbit/s) range, aiming for a network latency of 1 ms. This near-real-time responsiveness and improved overall data performance are crucial for applications like online gaming , augmented and virtual reality , autonomous vehicles , IoT, and critical communication services. Smartphones have
5160-640: The ARM . Acorn's development of their RISC OS operating system required around 200 OS development staff at its peak. Acorn C/C++ was released commercially by Acorn, for developers to use to compile their own applications. Having become a publicly traded company in 1983 during the home computer boom, Acorn's commercial performance in 1984 proved to be consequential. Many home computer manufacturers struggled to maintain customer enthusiasm, some offering unconvincing follow-up products that failed to appeal to buyers. The more successful manufacturers, like Amstrad, emphasised
5289-601: The Cambridge Ring networking system Hopper had worked on for his PhD , but it was soon decided to bring him into CPU as a director because he could promote CPU's interests at the University of Cambridge Computer Laboratory . CPU purchased Orbis, and Hopper's Orbis shares were exchanged for shares in CPU Ltd. CPU's role gradually changed as its Acorn brand grew, and soon CPU was simply the holding company and Acorn
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5418-490: The Computer Conservation Society organised an event at London's Science Museum to mark the legacy of the BBC Micro. A number of the BBC Micro's principal creators were present, and Sophie Wilson recounted to the BBC how Hermann Hauser tricked her and Steve Furber to agree to create the physical prototype in less than five days. Also in 2008 a number of former staff organised a reunion event to mark
5547-648: The Improved Mobile Telephone Service . These 0G systems were not cellular , supported a few simultaneous calls, and were very expensive. The first handheld cellular mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing 2 kilograms (4.4 lb). The first commercial automated cellular network ( 1G ) analog was launched in Japan by Nippon Telegraph and Telephone in 1979. This
5676-576: The National Enterprise Board (NEB) for help. After losing control of the company to the NEB, Sinclair encouraged Chris Curry to leave Radionics and get Science of Cambridge (SoC—an early name for Sinclair Research ) up and running. In June 1978, SoC launched a microcomputer kit, the MK14 , that Curry wanted to develop further, but Sinclair could not be persuaded so Curry resigned. During
5805-888: The Philippines . A pilot project in Bali was launched in 2011 by the International Finance Corporation and an Indonesian bank, Bank Mandiri . Mobile payments were first trialled in Finland in 1998 when two Coca-Cola vending machines in Espoo were enabled to work with SMS payments. Eventually, the idea spread and in 1999, the Philippines launched the country's first commercial mobile payments systems with mobile operators Globe and Smart . Some mobile phones can make mobile payments via direct mobile billing schemes, or through contactless payments if
5934-649: The WCDMA standard. This was followed by 3.5G or 3G+ enhancements based on the high-speed packet access (HSPA) family, allowing UMTS networks to have higher data transfer speeds and capacity. 3G is able to provide mobile broadband access of several Mbit/s to smartphones and mobile modems in laptop computers. This ensures it can be applied to mobile Internet access, VoIP , video calls, and sending large e-mail messages, as well as watching videos, typically in standard-definition quality. By 2009, it had become clear that, at some point, 3G networks would be overwhelmed by
6063-527: The Western Design Center in the US, where the 6502 was being updated by what was effectively a single-person company, showed Acorn engineers Steve Furber and Sophie Wilson they did not need massive resources and state-of-the-art research and development facilities. Sophie Wilson set about developing the instruction set, writing a simulation of the processor in BBC BASIC that ran on
6192-819: The ZX Spectrum . Curry conceived of the Electron as Acorn's sub-£200 competitor. In many ways a cut-down BBC Micro, it used one Acorn-designed uncommitted logic array (ULA) to reproduce most of the functionality. But problems in producing the ULAs led to short supply, and the Electron, although launched in August 1983, was not on the market in sufficient numbers to capitalise on the 1983 Christmas sales period. Acorn resolved to avoid this problem in 1984 and negotiated new production contracts. Acorn became more known for its BBC Micro model B than for its other products. In 2008,
6321-450: The internet of things (IoT), fixed wireless access , and multimedia streaming (including music, video, radio , and television ). Deployment of fifth-generation ( 5G ) cellular networks commenced worldwide in 2019. The term "5G" was originally used in research papers and projects to denote the next major phase in mobile telecommunication standards beyond the 4G / IMT-Advanced standards. The 3GPP defines 5G as any system that adheres to
6450-599: The screen . Depending on the device's type and design, the screen fills most or nearly all of the space on a device's front surface. Many smartphone displays have an aspect ratio of 16:9 , but taller aspect ratios became more common in 2017. Screen sizes are often measured in diagonal inches or millimeters ; feature phones generally have screen sizes below 90 millimetres (3.5 in). Phones with screens larger than 130 millimetres (5.2 in) are often called " phablets ." Smartphones with screens over 115 millimetres (4.5 in) in size are commonly difficult to use with only
6579-483: The 1980s. Acorn also developed the reduced instruction set computing (RISC) architecture set in 1985 and an operating system , RISC OS , for the hardware. The company also designed the ARM architecture; this part of the business was spun-off as Advanced RISC Machines under a joint venture with Apple and VLSI in 1990, now known as Arm Holdings , which is dominant in the mobile phone and personal digital assistant (PDA) microprocessor market today. Acorn in
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#17327828110716708-458: The 1984 film Supergirl: The Movie . Acorn also made or attempted various acquisitions. The Computer Education in Schools division of ICL was acquired by Acorn in late 1983 "reportedly for less than £100,000", transferring a staff of six to Acorn's Maidenhead office to form Acorn's Educational Services division and to provide "the core of education support development within Acorn". Having had
6837-678: The 1990s released the Risc PC line and the Acorn Network Computer , and also had a stint in the set-top box and educational markets. However, financial troubles led to the company closing down its workstation division in September 1998, effectively halting its home computer business and cancelling development of RISC OS and the Phoebe computer. The company was acquired and largely dismantled in early 1999. In retrospect, Acorn
6966-480: The 1990s, identifying the market as the largest in Europe whose technically sophisticated computer retailers were looking for opportunities to sell higher-margin products than IBM PC compatibles, with a large enthusiast community amongst existing and potential customers. Efforts were made to establish a local marketing presence and to offer localised versions of Acorn's products. Despite optimistic projections of success, and with Acorn having initially invested £700,000 in
7095-558: The 30th anniversary of the company's formation. The BBC Micro sold well—so much so that Acorn's profits rose from £3000 in 1979 to £8.6 million in July 1983. In September 1983, CPU shares were liquidated and Acorn was floated on the Unlisted Securities Market as Acorn Computer Group plc , with Acorn Computers Ltd. as the microcomputer division. With a minimum tender price of 120p, the group came into existence with
7224-579: The ABC range, was developed and later sold in 1985 as the Cambridge Workstation (using the Panos operating system). Advertising for this machine in 1986 included an illustration of an office worker using the workstation. The advert claimed mainframe power at a price of £3,480 (excluding VAT). The main text of the advertisement referred to available mainframe languages, communication capabilities and
7353-548: The Acorn founders with less than 15% ownership of the company. Meanwhile, the financial difficulties had reduced the number of employees at Acorn from a peak of 480 to around 270. With Brian Long appointed as managing director, Acorn were set to move forward with a new OEM-focused computer named the Communicator and the Cambridge Workstation , whose launch had been delayed until the end of July 1985 due to
7482-575: The Atom. After a great deal of discussion, Hauser suggested a compromise—an improved 6502-based machine with far greater expansion capabilities: the Proton. Acorn's technical staff had not wanted to do the Atom and they now saw the Proton as their opportunity to "do it right". One of the developments proposed for the Proton was the Tube , a proprietary interface allowing a second processor to be added. This compromise would make for an affordable 6502 machine for
7611-459: The BBC's plans, the BBC allowed other manufacturers to submit their proposals. Hauser quickly drafted in Steve Furber (who had been working for Acorn on a voluntary basis since the ACE fruit machine project) and Sophie Wilson to help complete a revised version of the Proton which met the BBC's specifications. BBC visited Acorn and were given a demonstration of the Proton. Shortly afterwards,
7740-742: The British Department of Education and Science (DES) had begun the Microelectronics Education Programme to introduce microprocessing concepts and educational materials. In 1981, through to 1986, the DoI allocated funding to assist UK local education authorities to supply their schools with a range of computers, the BBC Micro being one of the most popular. Schools were offered 50% of the cost of computers, providing they chose one of three models: BBC Micro, ZX Spectrum or Research Machines 380Z . In parallel,
7869-584: The DES continued to fund more materials for the computers, such as software and applied computing projects, plus teacher training. Although the NewBrain was under heavy development by Newbury, it soon became clear that they were not going to be able to produce it—certainly not in time for the literacy programme nor to the BBC's specification. The BBC's programmes, initially scheduled for autumn 1981, were moved back to spring 1982. After Curry and Sinclair found out about
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#17327828110717998-595: The GSM was used by over 5 billion people in over 220 countries. The GSM (2G) has evolved into 3G, 4G and 5G. The standardization body for GSM started at the CEPT Working Group GSM (Group Special Mobile) in 1982 under the umbrella of CEPT. In 1988, ETSI was established, and all CEPT standardization activities were transferred to ETSI. Working Group GSM became Technical Committee GSM. In 1991, it became Technical Committee SMG (Special Mobile Group) when ETSI tasked
8127-493: The Google Play Store), RIM's BlackBerry App World , or Android-related app stores like Aptoide , Cafe Bazaar , F-Droid , GetJar , and Opera Mobile Store . In February 2014, 93% of mobile developers were targeting smartphones first for mobile app development. As of 2022, the top five manufacturers worldwide were Samsung (21%), Apple (16%), Xiaomi (13%), Oppo (10%), and Vivo (9%). From 1983 to 1998, Motorola
8256-575: The Iyonix after the July 2006 introduction in the UK of the RoHS Regulations. The design was not compliant and Castle did not redesign the Iyonix. Sales continued for another two years via a newly established company, Iyonix Ltd, which enabled Castle itself to circumvent the regulations. On 25 September 2008, Castle announced that production of the Iyonix had ceased and that new units would no longer be available to order. Features include: It
8385-714: The SIM card from one mobile phone and inserting it into another mobile phone or broadband telephony device, provided that this is not prevented by a SIM lock . The first SIM card was made in 1991 by Munich smart card maker Giesecke & Devrient for the Finnish wireless network operator Radiolinja . A hybrid mobile phone can hold up to four SIM cards, with a phone having a different device identifier for each SIM Card. SIM and R-UIM cards may be mixed together to allow both GSM and CDMA networks to be accessed. From 2010 onwards, such phones became popular in emerging markets, and this
8514-472: The Tube protocols on each processor chosen, in the process finding out, during 1983, that there were no obvious candidates to replace the 6502. Because of many-cycle uninterruptible instructions, for example, the interrupt response times of the Motorola 68000 were too slow to handle the communication protocol that the host 6502-based BBC Micro coped with easily. The National Semiconductor 32016-based model of
8643-421: The UK, the total number of mobile phones overtook the number of houses in 1999. Today, mobile phones are globally ubiquitous, and in almost half the world's countries, over 90% of the population owns at least one. A handheld mobile radio telephone service was envisioned in the early stages of radio engineering. In 1917, Finnish inventor Eric Tigerstedt filed a patent for a "pocket-size folding telephone with
8772-578: The ability to transfer cash payments by secure SMS text message. Kenya's M-PESA mobile banking service, for example, allows customers of the mobile phone operator Safaricom to hold cash balances which are recorded on their SIM cards. Cash can be deposited or withdrawn from M-PESA accounts at Safaricom retail outlets located throughout the country and can be transferred electronically from person to person and used to pay bills to companies. Branchless banking has also been successful in South Africa and
8901-550: The abnormally high traffic. Capacity was further increased when phone companies implemented digital networks. With digital, one frequency can host multiple simultaneous calls. Additionally, short-range Wi-Fi infrastructure is often used by smartphones as much as possible as it offloads traffic from cell networks on to local area networks. The common components found on all mobile phones are: Low-end mobile phones are often referred to as feature phones and offer basic telephony. Handsets with more advanced computing ability through
9030-469: The alternative option of upgrading a BBC Micro using a coprocessor . The machine had shown Sophie Wilson and Steve Furber the value of memory bandwidth. It also showed that an 8 MHz 32016 was completely trounced in performance terms by a 4 MHz 6502. Furthermore, the Apple Lisa had shown the Acorn engineers that they needed to develop a windowing system; this was not going to be easy with
9159-961: The benefits of different calling plans. For example, a particular plan might provide for cheaper local calls, long-distance calls, international calls, or roaming. The mobile phone has been used in a variety of diverse contexts in society. For example: In 1998, one of the first examples of distributing and selling media content through the mobile phone was the sale of ringtones by Radiolinja in Finland. Soon afterwards, other media content appeared, such as news, video games, jokes, horoscopes, TV content and advertising. Most early content for mobile phones tended to be copies of legacy media , such as banner advertisements or TV news highlight video clips. Recently, unique content for mobile phones has been emerging, from ringtones and ringback tones to mobisodes , video content that has been produced exclusively for mobile phones. In many countries, mobile phones are used to provide mobile banking services, which may include
9288-404: The bundling of computers with essential peripherals such as monitors and cassette recorders along with value for money. The collapse of the market from the manufacturers' perspective, it was argued, was due to the "neglect of the market by the manufacturers". Market adversity had led to Atari being sold, and Apple nearly went bankrupt. The Electron had been launched in 1983, but problems with
9417-469: The call, from detecting the presence of a handset in a service area, temporary assignment of a channel to a handset making a call, interface with the land-line side of the network to connect to other subscribers, and collection of billing information for the service. The automation systems can control the "hand off" of a customer handset moving between one cell and another so that a call in progress continues without interruption, changing channels if required. In
9546-399: The clock rate (generally given in multiples of hertz ) but also the memory hierarchy also greatly affects overall performance. Because of these problems, the performance of mobile phone CPUs is often more appropriately given by scores derived from various standardized tests to measure the real effective performance in commonly used applications. One of the main characteristics of phones is
9675-407: The committee with UMTS (3G). In addition to transmitting voice over digital signals, the 2G network introduced data services for mobile, starting with SMS text messages, then expanding to Multimedia Messaging Service (MMS), and mobile internet with a theoretical maximum transfer speed of 384 kbit/s (48 kB/s). In 2001, the third-generation ( 3G ) was launched in Japan by NTT DoCoMo on
9804-488: The company and seeing their combined stake fall from 85.7% to 36.5%, the Italian computer company took a 49.3% stake in Acorn for £10.39 million, which went some way to covering Acorn's £10.9 million losses in the previous six months, effectively valuing Acorn at around a tenth of its valuation of £216 million the year before. Acorn's share price collapse and the suspension of its listing was attributed by some news outlets to
9933-443: The company's failure to establish itself in the US market, with one source citing costs of $ 5.5 million related to that endeavour. In July 1985, Olivetti acquired an additional £4 million of Acorn shares, raising its ownership stake in the company to 79.8%. Major creditors agreed to write off £7.9 million in debts, and the BBC agreed to waive 50% of outstanding royalty payments worth a reported £2 million. This second refinancing left
10062-435: The concept of frequency reuse allowing many simultaneous telephone conversations in a given service area. This allows efficient use of the limited radio spectrum allocated to mobile services, and lets thousands of subscribers converse at the same time within a given geographic area. Former systems would cover a service area with one or two powerful base stations with a range of up to tens of kilometers' (miles), using only
10191-471: The development of the MK14, Hermann Hauser , a friend of Curry's, had been visiting SoC's offices and had grown interested in the product. Curry and Hauser decided to pursue their joint interest in microcomputers and, on 5 December 1978, they set up Cambridge Processor Unit Ltd. (CPU) as the vehicle with which to do this. CPU soon obtained a consultancy contract to develop a microprocessor-based controller for
10320-437: The development of this machine. It was at this time that Acorn Computers Ltd. was incorporated and Curry moved to Acorn full-time. It was Curry who wanted to target the consumer market. Other factions within Acorn, including the engineers, were happy to be out of that market, considering a home computer to be a rather frivolous product for a company operating in the laboratory equipment market. To keep costs down and not give
10449-417: The doubters reason to object to the Atom, Curry asked industrial designer Allen Boothroyd to design a case that could also function as an external keyboard for the microcomputer systems. The internals of the System 3 were placed inside the keyboard, creating a quite typical set-up for an inexpensive home computer of the early 1980s: the relatively successful Acorn Atom . To facilitate software development,
10578-415: The earliest mobile phone systems by contrast, all control was done manually; the customer would search for an unoccupied channel and speak to a mobile operator to request connection of a call to a landline number or another mobile. At the termination of the call the mobile operator would manually record the billing information. Mobile phones communicate with cell towers that are placed to give coverage across
10707-555: The end of 1984, Acorn Computer Group was organised into several subsidiary companies. Acorn Computers Limited was responsible for the management of the microcomputer business, research and development, and UK sales and marketing, whereas Acorn Computer Corporation and Acorn Computers International Limited dealt with sales to the US and to other international markets respectively. Acorn Computers (Far East) Limited focused on component procurement and manufacturing with some distribution responsibilities in local markets. Acornsoft Limited
10836-467: The end of 1987, moving away from "individual customers" and towards "volume products", resulting in 47 of Acorn's 300 staff being made redundant, the closure of the custom systems division, and the abandonment of the Communicator. In February 1986, Acorn announced that it was ceasing US sales operations, and sold its remaining US BBC Microcomputers for $ 1.25 million to a Texas company, Basic, which
10965-496: The end of 2009. In 2014, there were more than seven billion mobile phone subscribers worldwide, a number that is expected to keep growing. Mobile phones are used for a variety of purposes, such as keeping in touch with family members, for conducting business, and in order to have access to a telephone in the event of an emergency. Some people carry more than one mobile phone for different purposes, such as for business and personal use. Multiple SIM cards may be used to take advantage of
11094-477: The endeavour, the loss-making operation was closed in 1995 as part of broader cost-cutting and restructuring in response to a decline in revenue and difficulties experienced by various Acorn divisions. Ostensibly facilitated or catalysed by Olivetti's acquisition of Acorn, reports in late 1985 indicated plans for possible collaboration between Acorn, Olivetti and Thomson in the European education sector to define
11223-531: The ergonomics associated with smaller 16:9 displays. Liquid-crystal displays are the most common; others are IPS , LED , OLED , and AMOLED displays. Some displays are integrated with pressure-sensitive digitizers, such as those developed by Wacom and Samsung , and Apple's " 3D Touch " system. In sound, smartphones and feature phones vary little. Some audio-quality enhancing features, such as Voice over LTE and HD Voice , have appeared and are often available on newer smartphones. Sound quality can remain
11352-420: The expected usage density, and may be much smaller in cities. In that case much lower transmitter powers are used to avoid broadcasting beyond the cell. In order to handle the high traffic, multiple towers can be set up in the same area (using different frequencies). This can be done permanently or temporarily such as at special events or in disasters. Cell phone companies will bring a truck with equipment to host
11481-470: The first ARM silicon on 26 April 1985; it worked first time and came to be known as ARM1. Its first practical application was as a second processor to the BBC Micro, where it was used to develop the simulation software to finish work on the support chips (VIDC, IOC, MEMC) and to speed up the operation of the CAD software used in developing ARM2. The ARM evaluation system was promoted as a means for developers to try
11610-486: The first quarter of 2016, the top smartphone developers worldwide were Samsung , Apple and Huawei ; smartphone sales represented 78 percent of total mobile phone sales. For feature phones as of 2016 , the top-selling brands were Samsung, Nokia and Alcatel . Mobile phones are considered an important human invention as they have been one of the most widely used and sold pieces of consumer technology. The growth in popularity has been rapid in some places, for example, in
11739-599: The growth of bandwidth-intensive applications, such as streaming media . Consequently, the industry began looking to data-optimized fourth-generation ( 4G ) technologies, with the promise of speed improvements up to tenfold over existing 3G technologies. The first publicly available LTE service was launched in Scandinavia by TeliaSonera in 2009. In the 2010s, 4G technology has found diverse applications across various sectors, showcasing its versatility in delivering high-speed wireless communication, such as mobile broadband,
11868-569: The influence of European companies had significantly decreased due to fierce competition from American and Asian companies, to where most technical innovation had shifted. Apple and Google, both of the United States, also came to dominate mobile phone software. The world's largest individual mobile operator by number of subscribers is China Mobile , which has over 902 million mobile phone subscribers as of June 2018 . Over 50 mobile operators have over ten million subscribers each, and over 150 mobile operators had at least one million subscribers by
11997-527: The instruction set allowed the code to be very dense, making ARM BBC BASIC an extremely good test for any ARM emulator. Such was the secrecy surrounding the ARM CPU project that when Olivetti were negotiating to take a controlling share of Acorn in 1985, they were not told about the development team until after the negotiations had been finalised. In 1992, Acorn once more won the Queen's Award for Technology for
12126-436: The latter out of a total of 450 employees. Meanwhile, Acorn's chosen method of expansion into West Germany and the United States through the establishment of subsidiaries involved a "major commitment of resources", in contrast with a less costly strategy that might have emphasised collaboration with local distributors. Localisation of the BBC Micro for the US market also involved more expenditure than it otherwise might have due to
12255-517: The literacy programme computer contract was awarded to Acorn, and the Proton was launched in December 1981 as the BBC Micro . In April 1984, Acorn won the Queen's Award for Technology for the BBC Micro. The award paid special tribute to the BBC Micro's advanced design, and it commended Acorn "for the development of a microcomputer system with many innovative features". In April 1982, Sinclair launched
12384-414: The local cell and in the adjacent cells. However, cells further away can re-use that channel without interference as the subscriber's handset is too far away to be detected. The transmitter power of each base station is coordinated to efficiently service its own cell, but not to interfere with the cells further away. Automation embedded in the customer's handset and in the base stations control all phases of
12513-489: The mass market which could be expanded with more sophisticated and expensive processors. The Tube enabled processing to be farmed out to the second processor leaving the 6502 to perform data input/output (I/O). The Tube would later be instrumental in the development of Acorn's ARM processor . In early 1980, the BBC Further Education department conceived the idea of a computer literacy programme, mostly as
12642-399: The phone and the point of sale support near field communication (NFC). Enabling contactless payments through NFC-equipped mobile phones requires the co-operation of manufacturers, network operators, and retail merchants. Mobile phones are commonly used to collect location data. While the phone is turned on, the geographical location of a mobile phone can be determined easily (whether it
12771-567: The phone close to the ear. The average phone battery lasts two–three years at best. Many of the wireless devices use a Lithium-Ion (Li-Ion) battery, which charges 500–2500 times, depending on how users take care of the battery and the charging techniques used. It is only natural for these rechargeable batteries to chemically age, which is why the performance of the battery when used for a year or two will begin to deteriorate. Battery life can be extended by draining it regularly, not overcharging it, and keeping it away from heat. Mobile phones require
12900-492: The portfolio. Even from the time of Acorn's earliest systems, the company was considering how to move on from the 6502 processor, introducing a Motorola 6809 processor card for its System 3 and System 4 models. Several years later in 1985, the Acorn Communicator employed the 16-bit 65816 processor as a step up from the 6502. The IBM PC was launched on 12 August 1981. Although a version of that machine
13029-635: The position of seeking a financing partner for Acorn, but in a significantly more urgent timeframe, making "financial institutions or a large computer company" the most likely candidates, these having the necessary resources and decision-making agility for a timely intervention. The dire financial situation was brought to a head in February 1985, when one of Acorn's creditors issued a winding-up petition. It would eventually emerge that Acorn owed £31.1 million to various creditors including manufacturers AB Electronics and Wong's Electronics. Wong's had been awarded
13158-537: The production problem and in 1984, production reached its anticipated volumes, but the contracts Acorn had negotiated with its suppliers were not flexible enough to allow volumes to be reduced quickly in this unanticipated situation, and supplies of the Electron built up. At the time of the eventual financial rescue of Acorn in early 1985, it still had 100,000 unsold Electrons plus an inventory of components which had all been paid for and needed to be stored at additional expense. 40,000 BBC Micros also remained unsold. After
13287-475: The project a secret, requiring developers to sign a non-disclosure agreement . Information was distributed to such developers via a confidential section of the website. Customers were occasionally able to buy the computer as a bare bones system for self-assembly. After speculation on the usenet newsgroups , a website for the hardware was spotted in mid October 2002. Units first went on sale in December 2002. Prices started from £1249. Castle ceased production of
13416-493: The proprietary operating system offering "limited flexibility". Instead, Olivetti sought to promote its M19 personal computer for the European schools market, offering it to Acorn for sale in the UK (ultimately, as the rebadged Acorn M19 ). Olivetti would eventually offer both Acorn's Master Compact and the Thomson MO6 to the Italian market with its Prodest branding. Mobile phone A mobile phone or cell phone
13545-429: The result of disagreement between Acorn and Lazards over the measures needed to rescue the company, with Lazards favouring a sale or refinancing whereby the founders would lose control, Acorn and their replacement advisors, Close Brothers, were reported to be pursuing a "radical reorganisation of the company". Lazards had sought to attract financing from GEC but had failed to do so. Close Brothers also found themselves in
13674-594: The retained "podule" bus, attracted comparisons to Acorn's aborted Phoebe PC ; however, such comparisons should be tempered with Phoebe's proposed feature set, which retained VIDC and 26-bit mode, and although Phoebe was intended to be capable of SMP configurations, its proposed shipping configuration had been for one SA110 CPU. Acorn Computers Acorn Computers Ltd. was a British computer company established in Cambridge , England in 1978 by Hermann Hauser , Chris Curry and Andy Hopper . The company produced
13803-525: The same time, Acorn also bought into Torus Systems - a company developing a "graphics-controlled local network called Icon" for the IBM PC platform - to broaden Acorn's networking expertise. Icon was a solution based on Ethernet, as opposed to the Acorn-related Econet and Cambridge Ring technologies, equipping appropriately specified IBM-compatible computers to participate on a network using
13932-552: The second-generation ( 2G ) digital cellular technology was launched in Finland by Radiolinja on the GSM standard. This sparked competition in the sector as the new operators challenged the incumbent 1G network operators. The GSM standard is a European initiative expressed at the CEPT ("Conférence Européenne des Postes et Telecommunications", European Postal and Telecommunications conference). The Franco-German R&D cooperation demonstrated
14061-420: The state of Acorn's finances intensified with the appointment of a temporary chief executive, Alexander Reid, to run the company, together with the announcement that Acorn had replaced its financial advisors, Lazards, and that the company's stockbrokers, Cazenove, had resigned, ultimately leading to the suspension of Acorn shares, these having fallen to a low of 23 pence per share. With these events reportedly being
14190-506: The supply of its ULA meant that Acorn was not able to capitalise on the 1983 Christmas selling period. A successful advertising campaign, including TV advertisements, had led to 300,000 orders, but the Malaysian suppliers were only able to supply 30,000 machines. The apparently strong demand for Electrons proved to be ephemeral: rather than wait, parents bought Commodore 64 or ZX Spectrum for their children's presents. Ferranti solved
14319-413: The suspension of Acorn's shares. Of subsequent significance, Hermann Hauser was also expected to announce a "VLSI chip design using a reduced instruction set". Unveiled towards the end of 1985, the Communicator was Acorn's answer to ICL's One Per Desk initiative. This Acorn machine was based around a 16-bit 65SC816 CPU, 128 KB RAM, expandable to 512 KB, plus additional battery-backed RAM. It had
14448-554: The system by putting the CPU card from the System 1 in a 19-inch (480 mm) Eurocard rack that allowed a number of optional additions. The System 2 typically shipped with keyboard controller, external keyboard, a text display interface, and a cassette operating system with built-in BASIC interpreter . The System 3 moved on by adding floppy disk support, and the System 4 by including
14577-465: The system for themselves. This system was used with a BBC Micro and a PC compatible version was also planned. Advertising was aimed at those with technical expertise, rather than consumers and the education market, with a number of technical specifications listed in the main text of the adverts. Wilson subsequently coded BBC BASIC in ARM assembly language, and the in-depth knowledge obtained from designing
14706-401: The technical feasibility, and in 1987, a Memorandum of Understanding was signed between 13 European countries that agreed to launch a commercial service by 1991. The first version of the GSM standard had 6,000 pages. The IEEE and RSE awarded Thomas Haug and Philippe Dupuis the 2018 James Clerk Maxwell medal for their contributions to the first digital mobile telephone standard. In 2018,
14835-699: The use of native software applications are known as smartphones . The first GSM phones and many feature phones had NOR flash memory, from which processor instructions could be executed directly in an execute in place architecture and allowed for short boot times. With smartphones, NAND flash memory was adopted as it has larger storage capacities and lower costs, but causes longer boot times because instructions cannot be executed from it directly, and must be copied to RAM memory first before execution. Mobile phones have central processing units (CPUs), similar to those in computers, but optimised to operate in low power environments. Mobile CPU performance depends not only on
14964-1087: Was a subsidiary of Datum, the Mexican manufacturer of the Spanish version of the BBC Microcomputer (with modified Spanish keyboards for the South American market). The sales office in Woburn, Massachusetts was closed at this time. Acorn was reported as having achieved "negligible U.S. sales". In 1990, in contrast, Acorn set up a sales and marketing operation in Australia and New Zealand by seeking to acquire long-time distributor Barson Computers Australasia, with Acorn managing director Sam Wauchope noting Acorn's presence in Australia since 1983 and being "the only computer manufacturer whose products are recommended by all Australian state education authorities". Acorn also sought once again to expand into Germany in
15093-507: Was aimed at the enthusiast market much like the BBC Micro, its real area of success was business. The successor to the PC, the XT (eXtended Technology) was introduced in early 1983. The success of these machines and the variety of Z80 -based CP/M machines in the business sector demonstrated that it was a viable market, especially given that sector's ability to cope with premium prices. The development of
15222-612: Was also spending a large portion of its reserves on development: the BBC Master was being developed; the ARM project was underway; the Acorn Business Computer entailed a lot of development work but delivered few products, with only the 32016-based model ever being sold (as the Cambridge Workstation). The company's research and development staff had grown from around 100 in 1983 to around 150 in 1984,
15351-412: Was attributed to the desire to obtain the lowest calling costs. When the removal of a SIM card is detected by the operating system, it may deny further operation until a reboot. Feature phones have basic software platforms. Smartphones have advanced software platforms. Android OS has been the best-selling OS worldwide on smartphones since 2011. A mobile app is a computer program designed to run on
15480-587: Was demonstrated by Martin Cooper of Motorola in New York City on 3 April 1973, using a handset weighing c. 2 kilograms (4.4 lbs). In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan. In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion; enough to provide one for every person on Earth. In
15609-555: Was followed in 1981 by the simultaneous launch of the Nordic Mobile Telephone (NMT) system in Denmark, Finland, Norway, and Sweden. Several other countries then followed in the early to mid-1980s. These first-generation ( 1G ) systems could support far more simultaneous calls but still used analog cellular technology. In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone. In 1991,
15738-404: Was launched in Finland in 2000, and subsequently many organizations provided "on-demand" and "instant" news services by SMS. Multimedia Messaging Service (MMS) was introduced in March 2002. The introduction of Apple's App Store for the iPhone and iPod Touch in July 2008 popularized manufacturer-hosted online distribution for third-party applications (software and computer programs) focused on
15867-543: Was launched in January 1979 as the first product of Acorn Computer Ltd. , a trading name used by CPU to keep the risks of the two different lines of business separate. The microcomputer kit was named as Acorn System 75. Acorn was chosen because the microcomputer system was to be expandable and growth-oriented. It also had the attraction of appearing before " Apple Computer " in a telephone directory. Around this time, CPU and Andy Hopper set up Orbis Ltd. to commercialise
15996-489: Was low enough, at around £80 (equivalent to £420 in 2023), to appeal to the more serious enthusiast as well. It was a very small machine built on two cards, one with an LED display, keypad, and cassette interface (the circuitry to the left of the keypad), and the other with the rest of the computer (including the CPU ). Almost all CPU signals were accessible via a Eurocard connector. The System 2 made it easier to expand
16125-455: Was market leader in mobile phones. Nokia was the market leader in mobile phones from 1998 to 2012. In Q1 2012, Samsung surpassed Nokia, selling 93.5 million units as against Nokia's 82.7 million units. Samsung has retained its top position since then. Aside from Motorola, European brands such as Nokia, Siemens and Ericsson once held large sway over the global mobile phone market, and many new technologies were pioneered in Europe. By 2010,
16254-460: Was owned by the National Enterprise Board , a government agency operating in close collaboration with the DoI. The choice was also somewhat ironic given that the NewBrain started life as a Sinclair Radionics project, and it was Sinclair's preference for developing it over Science of Cambridge's MK14 that led to Curry leaving SoC to found CPU with Hauser. The NEB moved the NewBrain to Newbury after Sinclair left Radionics and went to SoC. In 1980–1982,
16383-487: Was responsible for development work. At some point, Curry had a disagreement with Sinclair and formally left Science of Cambridge, but did not join the other Acorn employees at Market Hill until a little while later. The Acorn Microcomputer, later renamed the Acorn System 1 , was designed by Sophie Wilson (then Roger Wilson). It was a semi-professional system aimed at engineering and laboratory users, but its price
16512-447: Was responsible for development, production and marketing of software for Acorn's computer range. Vector Marketing Limited was established to handle distribution-related logistics and the increasing customer support burden. As part of Acorn's office automation aspirations, conducting "advanced software research and development", Acorn Research Center Incorporated was established in Palo Alto, California. Acorn Leasing Limited rounded out
16641-485: Was the first time substantial changes had been made to the platform since the release of the Risc PC in 1994. All interim machines had been built on the ARM7500 system on a chip , which was widely regarded as a single-chip Risc PC. (It incorporated the memory controller, video, sound, IO and CPU logic of a Risc PC, leaving only memory and disc interfacing to be added.) The presence of PCI and USB capabilities, as well as
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