33-455: ZAC Browser (Zone for Autistic Children) is a web browser designed specifically for children and teenagers with autism spectrum disorders, pervasive developmental disorders (PDD) , and PDD-NOS . Because autistic children display characteristics such as impairments in social interaction, impairments in communication, restricted interests and repetitive behavior, the standard browser experience can often be overwhelming. The ZAC browser reduces
66-407: A classic website , a five-page website or a brochure website are often static websites, because they present pre-defined, static information to the user. This may include information about a company and its products and services through text, photos, animations, audio/video, and navigation menus. Static websites may still use server side includes (SSI) as an editing convenience, such as sharing
99-517: A web site ) is one or more web pages and related content that is identified by a common domain name and published on at least one web server . Websites are typically dedicated to a particular topic or purpose, such as news, education, commerce, entertainment, or social media . Hyperlinking between web pages guides the navigation of the site, which often starts with a home page . The most-visited sites are Google , YouTube , and Facebook . All publicly-accessible websites collectively constitute
132-899: A common menu bar across many pages. As the site's behavior to the reader is still static, this is not considered a dynamic site. A dynamic website is one that changes or customizes itself frequently and automatically. Server-side dynamic pages are generated "on the fly" by computer code that produces the HTML (CSS are responsible for appearance and thus, are static files). There are a wide range of software systems, such as CGI , Java Servlets and Java Server Pages (JSP), Active Server Pages and ColdFusion (CFML) that are available to generate dynamic Web systems and dynamic sites . Various Web application frameworks and Web template systems are available for general-use programming languages like Perl , PHP , Python and Ruby to make it faster and easier to create complex dynamic websites. A site can display
165-522: A few years, Microsoft gained a dominant position in the browser market for two reasons: it bundled Internet Explorer with its popular Windows operating system and did so as freeware with no restrictions on usage. The market share of Internet Explorer peaked at over 95% in the early 2000s. In 1998, Netscape launched what would become the Mozilla Foundation to create a new browser using the open-source software model. This work evolved into
198-474: A large series of static pages. Early websites had only text, and soon after, images. Web browser plug-ins were then used to add audio, video, and interactivity (such as for a rich Web application that mirrors the complexity of a desktop application like a word processor). Examples of such plug-ins are Microsoft Silverlight , Adobe Flash Player , Adobe Shockwave Player , and Java SE . HTML 5 includes provisions for audio and video without plugins. JavaScript
231-971: A milestone confirmed by Netcraft in its October 2014 Web Server Survey and that Internet Live Stats was the first to announce—as attested by this tweet from the inventor of the World Wide Web himself, Tim Berners-Lee—the number of websites in the world have subsequently declined, reverting to a level below 1 billion. This is due to the monthly fluctuations in the count of inactive websites. The number of websites continued growing to over 1 billion by March 2016 and has continued growing since. Netcraft Web Server Survey in January 2020 reported that there are 1,295,973,827 websites and in April 2021 reported that there are 1,212,139,815 sites across 10,939,637 web-facing computers, and 264,469,666 unique domains. An estimated 85 percent of all websites are inactive. A static website
264-457: A range of devices, including desktops , laptops , tablets , and smartphones . By 2020, an estimated 4.9 billion people had used a browser. The most-used browser is Google Chrome , with a 67% global market share on all devices, followed by Safari with 18%. A web browser is not the same thing as a search engine , though the two are often confused. A search engine is a website that provides links to other websites. However, to connect to
297-408: A website's server and display its web pages, a user must have a web browser installed. In some technical contexts, browsers are referred to as user agents . The purpose of a web browser is to fetch content and display it on the user's device. This process begins when the user inputs a Uniform Resource Locator (URL), such as https://en.wikipedia.org/ , into the browser. Virtually all URLs on
330-492: Is also built into most modern web browsers, and allows for website creators to send code to the web browser that instructs it how to interactively modify page content and communicate with the web server if needed. The browser's internal representation of the content is known as the Document Object Model (DOM). WebGL (Web Graphics Library) is a modern JavaScript API for rendering interactive 3D graphics without
363-516: Is generally non-interactive. This type of website usually displays the same information to all visitors. Similar to handing out a printed brochure to customers or clients, a static website will generally provide consistent, standard information for an extended period of time. Although the website owner may make updates periodically, it is a manual process to edit the text, photos, and other content and may require basic website design skills and software. Simple forms or marketing examples of websites, such as
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#1732798574304396-495: Is one that has Web pages stored on the server in the format that is sent to a client Web browser. It is primarily coded in Hypertext Markup Language (HTML); Cascading Style Sheets (CSS) are used to control appearance beyond basic HTML. Images are commonly used to create the desired appearance and as part of the main content. Audio or video might also be considered "static" content if it plays automatically or
429-552: Is significant for users accustomed to keyboard shortcuts . The most popular desktop browsers also have sophisticated web development tools . Web browsers are popular targets for hackers , who exploit security holes to steal information, destroy files , and other malicious activities. Browser vendors regularly patch these security holes, so users are strongly encouraged to keep their browser software updated. Other protection measures are antivirus software and being aware of scams . Website A website (also written as
462-558: The Firefox browser, first released by Mozilla in 2004. Firefox's market share peaked at 32% in 2010. Apple released its Safari browser in 2003; it remains the dominant browser on Apple devices, though it did not become popular elsewhere. Google debuted its Chrome browser in 2008, which steadily took market share from Internet Explorer and became the most popular browser in 2012. Chrome has remained dominant ever since. By 2015, Microsoft replaced Internet Explorer with Edge for
495-482: The Windows 10 release. Since the early 2000s, browsers have greatly expanded their HTML , CSS , JavaScript , and multimedia capabilities. One reason has been to enable more sophisticated websites, such as web apps . Another factor is the significant increase of broadband connectivity in many parts of the world, enabling people to access data-intensive content, such as streaming HD video on YouTube , that
528-603: The World Wide Web . There are also private websites that can only be accessed on a private network , such as a company's internal website for its employees. Users can access websites on a range of devices, including desktops , laptops , tablets , and smartphones . The app used on these devices is called a web browser . The World Wide Web (WWW) was created in 1989 by the British CERN computer scientist Tim Berners-Lee . On 30 April 1993, CERN announced that
561-542: The Web start with either http: or https: which means they are retrieved with the Hypertext Transfer Protocol (HTTP). For secure mode (HTTPS), the connection between the browser and web server is encrypted , providing a secure and private data transfer. Web pages usually contain hyperlinks to other pages and resources. Each link contains a URL, and when it is clicked or tapped ,
594-558: The World Wide Web would be free to use for anyone, contributing to the immense growth of the Web. Before the introduction of the Hypertext Transfer Protocol (HTTP), other protocols such as File Transfer Protocol and the gopher protocol were used to retrieve individual files from a server. These protocols offer a simple directory structure in which the user navigates and where they choose files to download. Documents were most often presented as plain text files without formatting or were encoded in word processor formats. While "web site"
627-611: The average person. This, in turn, sparked the Internet boom of the 1990s, when the Web grew at a very rapid rate. The lead developers of Mosaic then founded the Netscape corporation, which released the Mosaic-influenced Netscape Navigator in 1994. Navigator quickly became the most popular browser. Microsoft debuted Internet Explorer in 1995, leading to a browser war with Netscape. Within
660-401: The browser navigates to the new resource. Most browsers use an internal cache of web page resources to improve loading times for subsequent visits to the same page. The cache can store many items, such as large images, so they do not need to be downloaded from the server again. Cached items are usually only stored for as long as the web server stipulates in its HTTP response messages. During
693-433: The course of browsing, cookies received from various websites are stored by the browser. Some of them contain login credentials or site preferences. However, others are used for tracking user behavior over long periods of time, so browsers typically provide a section in the menu for deleting cookies. Finer-grained management of cookies usually requires a browser extension . The first web browser, called WorldWideWeb ,
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#1732798574304726-407: The current state of a dialogue between users, monitor a changing situation, or provide information in some way personalized to the requirements of the individual user. For example, when the front page of a news site is requested, the code running on the webserver might combine stored HTML fragments with news stories retrieved from a database or another website via RSS to produce a page that includes
759-435: The latest information. Dynamic sites can be interactive by using HTML forms , storing and reading back browser cookies , or by creating a series of pages that reflect the previous history of clicks. Another example of dynamic content is when a retail website with a database of media products allows a user to input a search request, e.g. for the keyword Beatles . In response, the content of the Web page will spontaneously change
792-516: The number of user interface controls and removes access to much of the Web in order to simplify the experience for autistic children. John LeSieur had a grandson named Zack who was diagnosed with autism at the age of 3. Because of the autism, the child was often very frustrated when using the computer. LeSieur owned People CD Inc., a software production company, and released a web browser for children called KidCD in 2006. KidCD proved helpful for Zack, as he
825-508: The top four are made from different codebases . Safari , based on Apple 's WebKit code, is the second most popular web browser and is dominant on Apple devices, resulting in an 18% global share. Firefox , in fourth place, with about 3% market share, is based on Mozilla 's code. Both of these codebases are open-source, so a number of small niche browsers are also made from them. The most popular browsers share many features in common. They automatically log users' browsing history , unless
858-522: The use of plug-ins. It allows interactive content such as 3D animations, visualizations and video explainers to presented users in the most intuitive way. A 2010-era trend in websites called "responsive design" has given the best viewing experience as it provides a device-based layout for users. These websites change their layout according to the device or mobile platform, thus giving a rich user experience. Websites can be divided into two broad categories—static and interactive. Interactive sites are part of
891-461: The users turn off their browsing history or use the non-logging private mode . They also allow users to set bookmarks , customize the browser with extensions , and can manage user passwords . Some provide a sync service and web accessibility features. Common user interface (UI) features: While mobile browsers have similar UI features as desktop versions, the limitations of touch screens require mobile UIs to be simpler. The difference
924-419: The way it looked before, and will then display a list of Beatles products like CDs, DVDs, and books. Dynamic HTML uses JavaScript code to instruct the Web browser how to interactively modify the page contents. One way to simulate a certain type of dynamic website while avoiding the performance loss of initiating the dynamic engine on a per-user or per-connection basis is to periodically automatically regenerate
957-421: Was able to use the computer on his own. In 2008, KidCD 2.0 was released and added a feature that automatically switched icons on the screen. This feature was problematic for autistic children, who generally prefer very organized displays. LeSieur then developed an alternative version of KidCD 2.0, called ZAC Browser, which added aquarium graphics to the main page along with stationary icons. The specialty browser
990-477: Was created in 1990 by Sir Tim Berners-Lee . He then recruited Nicola Pellow to write the Line Mode Browser , which displayed web pages on dumb terminals . The Mosaic web browser was released in April 1993, and was later credited as the first web browser to find mainstream popularity. Its innovative graphical user interface made the World Wide Web easy to navigate and thus more accessible to
1023-429: Was designed to enable children with autism to use and benefit from the same types of websites other children use, including Sesame Street and PBS Kids . Web browser A web browser is an application for accessing websites . When a user requests a web page from a particular website, the browser retrieves its files from a web server and then displays the page on the user's screen. Browsers are used on
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1056-550: Was not possible during the era of dial-up modems . Google Chrome has been the dominant browser since the mid-2010s and currently has a 67% global market share on all devices. The vast majority of its source code comes from Google's open-source Chromium project; this code is also the basis for many other browsers, including Microsoft Edge , currently in third place with about a 5% share, as well as Samsung Internet and Opera in fifth and sixth places respectively with over 2% market share each. The other two browsers in
1089-867: Was the original spelling (sometimes capitalized "Web site", since "Web" is a proper noun when referring to the World Wide Web), this variant has become rarely used, and "website" has become the standard spelling. All major style guides, such as The Chicago Manual of Style and the AP Stylebook , have reflected this change. In February 2009, Netcraft , an Internet monitoring company that has tracked Web growth since 1995, reported that there were 215,675,903 websites with domain names and content on them in 2009, compared to just 19,732 websites in August 1995. After reaching 1 billion websites in September 2014,
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