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Microsoft Internet Explorer 5 (IE5) is a discontinued graphical web browser and one of the main participants of the first browser war. Its distribution methods and Windows integration were involved in ''United States v. Microsoft''. It is included with Windows 98 SE and Windows ME and it is the last version of Internet Explorer for Windows 3.1x, Windows NT 3.x and Windows 95. Although Internet Explorer 5 ran only on Windows, its siblings Internet Explorer for Mac 5 and Internet Explorer for UNIX 5 supported Mac OS X, Solaris and HP-UX. 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 the largest range of OSes of all the IE versions. However, support for many OSes quickly dropped off with later patches, and Windows XP and later Windows versions are not supported, because of inclusion of later IE. 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."'' IE5 attained over 50% market share by early 2000, taking the lead over other browser versions including IE4 and Netscape.〔(【引用サイトリンク】title=The Counter, March 2000 )〕 5.x versions attained over 80% market share by the release of IE6 in August 2001.〔(【引用サイトリンク】title=The Counter, 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.〔(【引用サイトリンク】title=The Counter, August 2003 )〕 In addition, by early 2005 Firefox 1.0 had overtaken it in market share.〔(【引用サイトリンク】title=Netscape's Market Share, March 2005 )〕 Version 5.x market share fell below 1% by the end of 2006.〔(【引用サイトリンク】title=Netscape's Market Share, December 2006 )〕 Microsoft spent over 100 million dollars (USD) a year in the late 1990s, with over 1000 people working on IE by 1999 during the development of IE5.〔(【引用サイトリンク】title=Memoirs From the Browser Wars )〕 Internet Explorer 5.x rendering behavior lives on in other browsers' quirks modes.〔(Unpacking Internet Explorer 8's multiple rendering modes ), Ars Technica.com〕 Internet Explorer 5 is no longer available for download from Microsoft. However, archived versions of the software can be found on various websites. ==History== The actual release of Internet Explorer 5 happened in three stages. First, a Developer Preview was released in June 1998 (5.0B1), and then a Public Preview was released in November 1998 (5.0B2). Then in March 1999 the final release was released (5.0). In September it was released with Windows 98 Second Edition. Version 5.01, a bug fix version, was released in December 1999. Windows 2000 includes this version. Version 5.0 was the last one to be released for Windows 3.1x or Windows NT 3.x. Internet Explorer 5 Macintosh Edition had been released a few months earlier on March 27, 2000, and was the last version of Internet Explorer to be released on a non-Windows platform. Version 5.5 for Windows was released in July 2000, bundled with Windows ME and 128-bit encryption but had no support for several older Windows. A 1999 review of IE5 by Paul Thurrott described IE5 in ways such as, ''"Think of IE 5.0 as IE 4.0 done right: All of the rough areas have been smoothed out..", "....comes optionally bundled with a full suite of Internet applications that many people are going to find irresistible.", "IE 5.0 is a world-class suite of Internet applications."'' Microsoft ended all support for Internet Explorer 5.5, including security updates, on December 31, 2005.〔(【引用サイトリンク】title=Lifecycle Supported Service Packs )〕 Microsoft continued to support Internet Explorer 5.01 on Windows 2000 SP4, according to its Support Lifecycle Policy however as with Windows 2000 this support was removed on July 13, 2010.〔(【引用サイトリンク】title=Microsoft Product Lifecycle )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Internet Explorer 5」の詳細全文を読む スポンサード リンク
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