Details about all Internet Explorer versions, which is useful for testing the browser compatibility:

Internet Explorer 7

Internet Explorer 7.0 was released in November 2006.

Internet Explorer 7 provides improved navigation through tabbed browsing, web search from the toolbar, advanced printing, easy discovery, reading and subscription to RSS feeds.

New features:

* Advanced printing (automatically scales a webpage for printing)
* Instant Search box
* Favorites Center
* RSS feeds (automatically detects RSS feeds)
* Tabbed browsing (view multiple sites in a single browser window)
* Quick Tabs
* Tab Groups
* Page zoom

Internet Explorer 6

Internet Explorer 6.0 is the standard browser in Windows XP. It was released in August 2001.

Windows XP is built on Windows 2000 and is the successor to Windows 98, Millennium, and Windows 2000.
Internet Explorer 5

Internet Explorer 5 was the first major browser with XML support.

Version 5.5 (July 2000) for Windows 95, 98, NT 4.0, and Windows 2000. Support for XML/XSL, CSS, printing (print preview) and HTC behaviors.

Version 5.01 (November 1999) Primarily a bug fix for 5.0.

Version 5.0 (March 1999) The first major browser with XML support.
Older Internet Explorer Versions

The oldest versions of Internet Explorer are no longer in use by any majority of users. Web developers will ignore them. Their functionality is outdated.

Version 4.0 (released in 1997) is used by less than 1%. It has respectable CSS and DOM support, but no XML support.

Version 3.0 (released in 1996) is now used by less than 0.1%.

Version 2.0 (released in 1995). It is too old. Nobody uses it.

Version 1.0 (released in 1995). Does anyone remember it?

Internet Explorer for Macintosh

Version 5.1.7 is the latest version of Internet Explorer for Mac OS 8 and 9. It was released in July 2003.

Version 5.2.3 is the latest version of Internet Explorer for Mac OS X. It was released in June 2003.

Note: version 5.2.3 requires special features in Mac OS X. Mac OS 8 and 9 users must download and install version 5.1.7.