Tasman is a discontinued browser engine developed by Microsoft for inclusion in the Macintosh version of Internet Explorer 5.
At the time of its release, Tasman was seen as the layout engine with the best support for web standards such as HTML and CSS.
[1] Internet Explorer for Mac is no longer supported, but newer versions of Tasman were incorporated in some other Microsoft products.
In a posting to the Mac Internet Explorer Talk list, Internet Explorer for Mac program manager Jimmy Grewal listed improvements: For a while Tasman was improved as part of a number of TV set-top box projects at Microsoft reaching version 1.0.
[6] Microsoft Edge, the successor to Internet Explorer, uses the Blink engine on macOS and WebKit on iOS/iPadOS.