Windows Internet Explorer 8

Windows Internet Explorer 8 (commonly abbreviated IE8) is the next version of Microsoft's Internet Explorer web browser, succeeding Internet Explorer 7. Beta 1 was released to the general public on March 5, 2008.

According to Microsoft, security, ease of use, and improvements in RSS, CSS, and Ajax support are its priorities for IE8, along with significantly better support of web standards than its predecessor. As a result of better standards compliance, IE8 will break compatibility with web pages that were designed around the bugs and quirks of previous versions. To soften the impact of these compatibility issues, IE8 will enable web designers to turn off all breaking changes in IE8. There are three modes that IE8 can render, named, "Quirks," "Strict," and "Standard." When there is an old DOCTYPE or when there is no DOCTYPE IE renders it like IE5 would (quirks mode). When a special meta element or its corresponding HTTP header is included in a web page, IE8 will render that page like IE7 would (strict mode). Users can switch between the three modes with a few clicks and then restarting Internet Explorer.

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Internet Explorer 7

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Internet Explorer 7

Windows Internet Explorer 7, commonly abbreviated IE7, is a web browser released by Microsoft in late 2006 for Windows Vista, Windows XP SP2 and Windows Server 2003 SP1. Internet Explorer 7 is part of a long line of Internet Explorer versions and the first major version of the browser in over 5 years, coinciding with the release of Windows Vista. Its market share is increasing as it ships as the default browser in Vista and is offered as a replacement for Internet Explorer 6 on Windows XP via Windows Update. While sources are not in agreement as to IE7's global market share (estimates from three sources range from 23% to 44%), when combined with IE6, the two browsers represent the majority of browsers worldwide.

Overview

Version 7.0 of Internet Explorer has been renamed Windows Internet Explorer (as opposed to Microsoft Internet Explorer) as part of Microsoft's rebranding of components that are included with Windows. It is available as part of Windows Vista and Windows Server 2008, and as a separate download via Windows Update for Windows XP with Service Pack 2 (SP2) and Windows Server 2003 with SP1 or SP2. Internet Explorer 7 can also be downloaded directly from Microsoft's website. Large portions of the underlying architecture, including the rendering engine and security framework, have been significantly reworked. Partly as a result of security enhancements, the browser is a stand-alone application, rather than integrated with the Windows shell, and is thus no longer capable of acting as a file browser. The first security advisory was posted only one day after the day of release, but it turned out to be a security problem in Outlook Express, not in Internet Explorer 7. The first vulnerability exclusive to Internet Explorer 7 was posted after 6 days. On Windows Vista, Internet Explorer operates in a special "Protected Mode", that runs the browser in a security sandbox that has no access to the rest of the operating system or file system, except the Temporary Internet Files folder. When running in Protected Mode, IE7 is a low integrity process; it cannot gain write access to files and registry keys outside of a user profile's folder. This feature aims to mitigate problems whereby newly-discovered flaws in the browser (or in Add-Ons hosted inside it) allowed hackers to subversively install software on the user's computer (typically spyware).

The Windows Vista and XP version of Windows Internet Explorer 7 additionally feature an update to the WinInet API. The new version has better support for IPv6, and handles hexadecimal literals in the IPv6 address. It also includes better support for Gzip and deflate compression, so that communication with a web server can be compressed and thus will require less data to be transferred. Internet Explorer Protected Mode support in WinInet is exclusive to Windows Vista.

On October 8, 2007, Microsoft removed the Windows Genuine Advantage component of IE7 and opened it for all users of Windows.

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Internet Explorer 6

Microsoft Internet Explorer 6 (commonly abbreviated to IE6), is a graphical web browser developed by Microsoft and included as part of the Microsoft Windows XP and Windows Server 2003 lines of operating systems. It was the most widely used web browser during its tenure (surpassing Internet Explorer 5.x), attaining a peak of about 95% usage share during 2002 and 2003 when it began steadily declining until 2007 when it rapidly lost market share to Windows Internet Explorer 7.

Microsoft Internet Explorer 6.0 was released on August 27, 2001, shortly after Windows XP was finished. This version included DHTML enhancements, content restricted inline frames, and partial support of CSS level 1, DOM level 1 and SMIL 2.0 The MSXML engine was also updated to version 3.0. Other new features included a new version of the Internet Explorer Administration Kit (IEAK), Media bar, Windows Messenger integration, fault collection, automatic image resizing, P3P, and a new look-and-feel that was in line with the "Luna" visual style of Windows XP, when used in Windows XP. In 2002, the Gopher protocol was disabled and support for it was dropped in Internet Explorer 7. In a May 7, 2003 Microsoft online chat, Brian Countryman, Internet Explorer Program Manager, declared that on Microsoft Windows, Internet Explorer would cease to be distributed separately from the operating system (IE 6 would be the last standalone version); it would, however, be continued as a part of the evolution of the operating system, with updates coming only bundled in operating system upgrades. Thus, Internet Explorer and Windows itself would be kept more in sync. However, after one release in this fashion (6.0 Service Pack 2 in August 2004), Microsoft changed its plan and released Internet Explorer 7 for Windows XP SP2 and Windows Server 2003 SP1 in late 2006.

IE6 remained more popular than its successor in business use for more then a year after IE7 came out.

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Microsoft Internet Explorer 5

Microsoft Internet Explorer 5 (Internet Explorer 5) is a graphical web browser released in March 1999 by Microsoft, primarily for Microsoft Windows, but initially with versions available for Apple Macintosh, Solaris, and HP-UX. (see Internet Explorer for Mac and Internet Explorer for Unix)
It was one of the main participants of the first Browser war. Its distribution methods and Windows integration were involved in United States v. Microsoft. It was superseded by Microsoft Internet Explorer 6.0 in August 2001, although IE 5.x remains the last version for Windows 3.1, Windows NT 3, and Windows 95. Version 5.0 was included with Windows 98 Second Edition (using the Trident II layout), and 5.5 with Windows Me (Trident III) when they were introduced. The Mac edition came out in 2000 and was included with Mac OS X, and the Tasman layout engine.
IE5 presided over a large market share increase over Netscape Navigator between 1999 and 2001, and offered many advanced features for its day. In addition, it was compatible with largest range of OS of all the IE versions. However, support for many OS quickly dropped off with later patches, and Windows XP and later Windows versions are not supported, because of inclusion of later IE versions.
The 1999 review in PC World noted, "Credit the never-ending game of browser one-upsmanship that Netscape and Microsoft play. The new IE 5 trumps Netscape Communicator with smarter searching and accelerated browsing."[
Internet Explorer 5 attained over 50% market share by early 2000, taking the lead over other browser versions including IE4 and Netscape. 5.x versions attained over 80% market share by the release of IE6 in August 2001. 5.0x and 5.5 were surpassed by Internet Explorer 6.0, dropping it to the second most popular browser, with market share dropping to 34 percent by mid 2003. In addition, by early 2005 Firefox 1.0 had overtaken it in market share. Version 5.x market share fell below 1% in by the end of 2006. Microsoft spent over a 100 million dollars (USD) a year in the late 1990s, with over 1000 people working on IE by 1999 during the development of IE5.

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Internet Explorer 4

Microsoft Internet Explorer 4 (Internet Explorer 4.0) is a graphical web browser released in September 1997 by Microsoft, primarily for Microsoft Windows, but also with versions available for Apple Mac OS, Solaris, and HP-UX.

It was one of the main participants of the first Browser war. Its distribution methods and Windows integration were involved in United States v. Microsoft. It was superseded by Microsoft Internet Explorer 5.0 in March 1999. Version 4.0 was included with Windows 95 OSR 2.5 and 4.01 in Windows 98, in addition the Internet Explorer layout engine Trident was introduced. It attained just over 60% market share by March 1999 when IE 5.0 was released. In August 2001 when Internet Explorer 6.0 was released IE 4.x had dropped to 7% market share and IE5 had increased to 80%. IE 4 market share dropped under 1% by 2004.

Internet Explorer 4's marketing tagline was "The Web the Way You Want It!".

The Internet Explorer 4.0 Beta was released in April 1997, and Beta in July that year. Internet Explorer 4.0 was released to the public in September, 1997 and deepened the level of integration between the web browser and the underlying operating system. Installing version 4 on a Windows 95 or Windows NT 4 machine and choosing "Windows Desktop Update" would result in the traditional Windows Explorer being replaced by a version more akin to a web browser interface, as well as the Windows desktop itself being web-enabled via Active Desktop. The integration with Windows, however, was subject to numerous packaging criticisms (see United States v. Microsoft). This option was no longer available with the installers for later versions of Internet Explorer but was not removed from the system if already installed. Internet Explorer 4 introduced support for Group Policy, allowing companies to configure and lock down many aspects of the browser's configuration. Internet Mail and News was replaced with Outlook Express, and Microsoft Chat and an improved NetMeeting were also included. This version also was included with Windows 98. Version 4.5 (only for Mac) dropped support for 68k Macs, but offered new features such as easier 128-bit encryption. The last version for non-mac, was 4.0 Service Pack 2, however. Uninstalling IE4 became the subject of concern to some users and was a point of contention in later lawsuits

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