003.12.17
3.1 may refer to: * An approximation of the mathematical constant π * A shorthand reference to release 3.1 of some piece of software, such as Windows 3.1x Windows 3.1 is a major release of Microsoft Windows. It was released to manufacturing on April 6, 1992, as a successor to Windows 3.0. Like its predecessors, the Windows 3.1 series ran as a shell on top of MS-DOS. Codenamed Janus, Windows 3. ...