OS/2

OS/2 was an operating system originally developed jointly by Microsoft and IBM. Between the release of Windows 3.0 and OS/2 1.3, Microsoft stopped all cooperation with IBM and IBM developed OS/2 on its own, starting with IBM OS/2 2.0. OS/2 was later sold to Serenity Systems and renamed to eComStation.

Versions

 * IBM OS/2 1.0
 * Microsoft OS/2 1.0
 * IBM OS/2 1.0 Extended Edition
 * IBM OS/2 1.1
 * Microsoft OS/2 1.1
 * IBM OS/2 1.1 Extended Edition
 * IBM OS/2 1.2
 * IBM OS/2 1.2 Extended Edition
 * Microsoft OS/2 1.2
 * IBM OS/2 1.3
 * Microsoft OS/2 Server 1.3
 * IBM OS/2 1.3 Extended Edition
 * Microsoft OS/2 Server 1.30.1
 * IBM OS/2 1.30.1 Extended Edition
 * IBM OS/2 2.0
 * IBM OS/2 2.1
 * IBM OS/2 2.11
 * IBM OS/2 Warp 3
 * IBM OS/2 Warp 4
 * IBM OS/2 Warp 4.5

It Must Needs to be completed.