Watson was a software program released by Karelia Software for the Apple Macintosh on November 27, 2001, which provided Internet content through a familiar Mac OS X-like interface through the use of plug-ins.Plug-ins were programmed in the Objective-C language using the Cocoa frameworks, included with the Mac OS X operating system.On September 18, 2002, Apple bundled a similar program, Sherlock 3, with Mac OS X v10.2.