The original release was textmode-only, and a GUI was introduced with OS/2 1.1 about a year later. OS/2 1.0 was announced in April 1987 and released in December. It was code-named "CP/DOS" and it took two years for the first product to be delivered. The development of OS/2 began when IBM and Microsoft signed the "Joint Development Agreement" in August 1985. OS/2 1.0 featured a text-mode interface similar to MS-DOS. Development history 1985–1989: Joint development Since then, OS/2 has been developed, supported and sold by two different third-party vendors under license from IBM – first by Serenity Systems as eComStation since 2001, and later by Arca Noae LLC as ArcaOS since 2017.
IBM discontinued its support for OS/2 on 31 December 2006. While OS/2 was arguably technically superior to Microsoft Windows 95, OS/2 failed to develop much penetration in the mass market consumer and stand-alone desktop PC segments OS/2 sales were largely concentrated in networked computing used by corporate professionals however, by the early 1990s, it was overtaken by Microsoft Windows NT. Up to $990 million per year was spent developing OS/2 and its replacement. Because of this heritage, OS/2 shares similarities with Unix, Xenix, and Windows NT. Notably, basic system calls were modeled after MS-DOS calls their names even started with "Dos" and it was possible to create "Family Mode" applications – text mode applications that could work on both systems.
OS/2 was intended as a protected-mode successor of PC DOS targeting the Intel 80286 processor. The first version of OS/2 was released in December 1987 and newer versions were released until December 2001.
The name stands for "Operating System/2", because it was introduced as part of the same generation change release as IBM's " Personal System/2 (PS/2)" line of second-generation personal computers. As a result of a feud between the two companies over how to position OS/2 relative to Microsoft's new Windows 3.1 operating environment, the two companies severed the relationship in 1992 and OS/2 development fell to IBM exclusively.
OS/2 ( Operating System/2) is a series of computer operating systems, initially created by Microsoft and IBM under the leadership of IBM software designer Ed Iacobucci. Ĥ.52 / December 2001 21 years ago ( 2001-12)Ĭhinese, English, French, German, Italian, Japanese, Korean, Spanish, Slovenian, Portuguese, Russian This version was released on 25 September 1996.
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