|Written in||C, C++ and assembly language|
|Working state||Historical, now developed as ArcaOS|
|Source model||Closed source|
|Initial release||December 1987|
|Latest release||4.52 / December 2001|
|Marketing target||Professionals, servers|
|Available in||Chinese, English, French, German, Italian, Japanese, Korean, Spanish, Portuguese, Russian|
|Kernel type||Hybrid kernel|
|Influenced by||MS-DOS, IBM PC DOS|
|Workplace Shell Graphical user interface|
|Succeeded by||First by eComStation, then ArcaOS|
|Official website||OS/2 Warp (Archived)|
OS/2 is an operating system that was originally made by a joint agreement between the Microsoft and IBM companies. The name stands for "Operating System/2". It was intended to replace MS-DOS and Microsoft Windows. OS/2 was maintained by IBM until 2006.
IBM discontinued its support for OS/2 on 31 December 2006. Since then, it has been updated, maintained and marketed under the name eComStation. In 2015 it was announced that a new OEM distribution of OS/2 would be released that was to be called ArcaOS.