A web browser is a software application which enables a user to display and interact with text, images, videos, music and other information typically located on a Web page at a website on the World Wide Web or a local area network. Text and images on a Web page can contain hyperlinks to other Web pages at the same or different website. Web browsers allow a user to quickly and easily access information provided on many Web pages at many websites by traversing these links. Web browsers format HTML information for display, so the appearance of a Web page may differ between browsers .
Some of the Web browsers available for personal computers include Internet Explorer, Mozilla Firefox, Safari, and Opera in order of descending popularity (in November 2007).[2] Web browsers are the most commonly used type of HTTP user agent. Although browsers are typically used to access the World Wide Web, they can also be used to access information provided by Web servers in private networks or content in file systems.
INTERNET EXPLORER
Windows Internet Explorer (formerly Microsoft Internet Explorer abbreviated MSIE), commonly abbreviated to IE, is a series of graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems starting in 1995. It has been the most widely used web browser since 1999, attaining a peak of about 95% usage share during 2002 and 2003 with IE5 and IE6 but steadily declining since, despite the introduction of IE7.
After the first release for Windows 95, additional versions of Internet Explorer were developed for other operating systems: Internet Explorer for Mac and Internet Explorer for UNIX (the latter for use through the X Window System on Solaris and HP-UX), and versions for older versions of Windows. Only the Windows version remains in active development; the Mac OS X and UNIX version are no longer supported.
Internet Explorer was first released as part of the add-on package Plus! for Windows 95. Later versions are available as free downloads and are also included in the OEM service releases of Windows 95 and in later versions of Windows. The most recent release is version 7.0, which is available as a free update for Windows XP with Service Pack 2, and Windows Server 2003 with Service Pack 1 or later, and is included with Windows Vista. An embedded OEM version called Internet Explorer for Windows CE (IE CE) is also available for WinCE based platforms and is currently based on IE6. Another Windows CE/ Windows Mobile browser known as Internet Explorer Mobile is from a different codebase and should not be confused with desktop versions of the browser.
Internet Explorer for Mac (also referred to as Internet Explorer: mac, IE: mac or Internet Explorer Macintosh Edition) was a proprietary web browser developed by Microsoft for the Macintosh platform. Initial versions were developed from the same code base as Internet Explorer for Windows. Later versions diverged, particularly with the release of version 5 which included the Tasman rendering engine.
As a result of the five-year agreement between Apple and Microsoft in 1997, it was the default browser on Mac OS before it was replaced by Apple's own Safari web browser in 2003. Internet Explorer for Mac remained available for download from Microsoft until January 31, 2006. However, no major updates had been released since March 27, 2000, aside from bug fixes and updates to take advantage of new features in Mac OS X.
On June 13, 2003, Microsoft announced that it was ceasing further development of Internet Explorer for Mac. The browser was not included in default installation of Mac OS X v10.4 "Tiger" which was released on April 29, 2005. Microsoft discontinued support for the product on December 31, 2005 and removed the application from their Macintosh downloads site on January 31, 2006. Microsoft recommends "that Macintosh users migrate to more recent web browsing technologies such as Apple's Safari." [2]
Macintosh, or for newer models, Mac, is a brand name which covers several lines of personal computers designed, developed, and marketed by Apple Inc. The original Macintosh was released on January 24, 1984; it was the first commercially successful personal computer to feature a mouse and a graphical user interface (GUI) rather than a command line interface.
The idea for a personal computer appropriate for the ordinary consumer dates to the late 1970s and an Apple development team was established in 1979. After the success of the original Macintosh in 1984, the company quickly established market share only to see it dissipate in the 1990s as Microsoft came to monopolize personal computing. Apple consolidated multiple, consumer-level desktop models into the 1998 iMac, which sold extremely well and saw the brand name revitalized. Current Mac systems are mainly targeted at the home, education, and creative professional markets. They are the upgraded iMac and the entry-level Mac mini desktop models, the workstation-level Mac Pro tower, the MacBook, MacBook Air and MacBook Pro laptops, and the Xserve server.
Production of the Mac is based on a vertical integration model in that Apple facilitates all aspects of its hardware and creates its own operating system that is pre-installed on all Macs. Apple exclusively produces Mac hardware, choosing internal systems, designs, and prices. Apple does use third party components, however; current Macintosh CPUs use Intel's x86 architecture (formerly the AIM alliance's PowerPC and originally Motorola's 68k). Apple also develops the operating system for Macs, currently Mac OS X 10.5 "Leopard". This is in contrast to most IBM compatible PCs, where multiple vendors create hardware intended to run another company's software. The modern Mac, like other personal computers, is capable of running alternative operating systems such as Linux, FreeBSD, and Microsoft Windows, which is considered to be the Mac's biggest competitor.
INTERNET EXPLORER FOR UNIX
Internet Explorer for UNIX is a proprietary graphical web browser that was freely available and produced by Microsoft for use in the X Window System on Solaris or HP-UX. Development ended with a version of Internet Explorer 5 in 2001 and support for it was completely discontinued in 2002.
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