Q189794

Also known as Operating System/2

OS/2 (Operating System/2) is a proprietary computer operating system for x86 and PowerPC based personal computers created and initially developed jointly by IBM and Microsoft, under the leadership of IBM software designer Ed Iacobucci, intended as a replacement for DOS. The first version was released in 1987. A feud between the two companies beginning in 1990 led to Microsoft's leaving development solely to IBM, which continued development on its own. OS/2 Warp 4 in 1996 was the last major upgrade, after which IBM slowly halted the product as it failed to compete against Microsoft's Windows; u

Key facts

OS.name: OS/2
OS.logo: Os2logo.svg
OS.logo size: 120px
OS.logo alt: OS/2 Logo
OS.screenshot: Os2W4.png
OS.caption: OS/2 Warp 4 desktop. This version was released on 25 September 1996.
OS.screenshot_size: 330px
OS.screenshot_alt: OS/2 Warp 4
OS.developer: IBMMicrosoft (1.0–1.3)
OS.working state: Historical, now developed as ArcaOS
OS.source model: Closed source
OS.discontinued: yes
OS.latest release version: 4.52
OS.marketing target: Professionals, servers
OS.programmed in: C, C++ and assembly language
OS.language: Chinese, English, French, German, Italian, Japanese, Korean, Spanish, Slovenian, Portuguese, Russian
OS.prog_language: REXX, Object Rexx, Java
OS.supported platforms: IA-32, PowerPC

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Wikidata facts

Official website: www.ecomstation.com

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Commons category: OS/2
name in kana: オーエス・ツー
software version identifier: 4.52 Convenience Pack 2
inception: 1987-12-00

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Article

37 sections

Contents

Development{{anchor|Development history}}
1985–1990: Joint IBM–Microsoft development
OS/2 1.0 (1987){{anchor|1.0}}
OS/2 1.1 (1988){{anchor|1.1}}
OS/2 1.2 (1989){{anchor|1.2|1.21}}
1990: Breakup
OS/2 1.3 (1990){{anchor|1.3}}
1990–1996: Post-breakup{{anchor|32-bit era}}
OS/2 2.0 (1992){{anchor|2.0}}
OS/2 2.1 (1993){{anchor|2.1}}
OS/2 Warp 3 (1994){{anchor|OS/2 Warp|3.0|3.0J|The "Warp" years}}
Workplace OS (1995) {{Anchor|Workplace OS|WorkplaceOS}}
OS/2 Warp 4 (1996){{anchor|Warp 4|4.0|4.5}}
1996–2001: Downsizing{{anchor|Downsizing}}
2001–2006: Discontinuation and end-of-life{{anchor|Fading out}}
2001–present: Third-party development{{anchor|Third-party development}}
Petitions for open source
Summary of releases
Features and technology
User interface
Commands
Networking
Drivers
Virtualization
Security niche
Problems
Historical uses
Banks
Transport operators
Retail
Other notable users
Awards
IBM products using OS/2
See also
References
Further reading
External links

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 PCs. OS/2 was intended as a protected-mode successor of PC DOS targeting the Intel 80286 processor. Notably, basic system calls were modelled 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. Because of this heritage, OS/2 shares similarities with Unix, Xenix, and Windows NT. OS/2 sales were largely concentrated in networked computing used by corporate professionals.