OS/2
 | |
 | |
| Developer | IBM, Microsoft (1.x) |
|---|---|
| Source model | Closed source |
| Initial release | OS/2 1.0 (December 1987) |
| Latest release | OS/2 Warp 4.52 (December 2001) |
| Supported platforms | x86, PowerPC |
| Kernel type | Hybrid |
| User interface | Workplace Shell |
| License | Proprietary |
OS/2(Operating System/2) was an operating system originally developed jointly by Microsoft and IBM, in development was codenamed "CP/DOS". Between the release of Windows 3.0 and OS/2 1.3, Microsoft stopped all cooperation with IBM, due to a feud between the companies' significantly different cultures and visions. IBM later on handle the development of the operating system by itself.
OS/2 have features like a virtual DOS machine, the WinOS/2 subsystem (Windows 3.0/3.1x inside OS/2), Presentation Manager, and more.
Microsoft later used OS/2 code to develop Windows NT 3.1. OS/2 code was later used by Serenity Systems to develop eComStation in 2001, which in turn was used by Arca Noae LLC to develop ArcaOS in 2017.
Timeline[edit | edit source]
OS/2 Classic versions | |||
|---|---|---|---|
| Name | Version | Codename | Notes |
| OS/2 1.0 | 1.0 | CP/DOS | Released in 1987-12 without GUI. |
| OS/2 1.1 | 1.1 | Trimaran | Released in 1988-10, first version with the Presentation Manager. |
| OS/2 1.2 | 1.2 | Sloop | Released in 1989, updated UI to look like Windows 3.0. |
| OS/2 1.3 | 1.3 | Cutter | Released in 1990 |
| OS/2 2.0 | 2.0 | Cruiser | Released in 1992-04, First version of OS/2 that developed by IBM without Microsoft's help. |
| OS/2 2.00.1 | 2.00.1 | Riker | Released in 1992-10 |
| OS/2 2.1 | 2.1 |
Borg, Yawl |
Released in 1993-05, Updated version of the WinOS/2. |
| OS/2 2.11 | 2.11 | None |
Released in 1994-02 |
OS/2 Warp versions | |||
| Name | Version | Codename | Notes |
| OS/2 Warp 3 | 3.0 | Warp | Released in 1994-10, First version to introduce the Warp branding. |
| OS/2 Warp 4 | 4.0 | Merlin | Released in 1996-09 |
| OS/2 Warp Server for e-Business | 4.5 | Aurora | Released in 1999-04 |
| OS/2 Warp 4.51 | 4.51 | MCP/ACP | Released in 2000-11 |
| OS/2 Warp 4.52 | 4.52 | MCP2/ACP2 | Released in 2001-12 |
Planned versions that were never finished[edit | edit source]
Warp era[edit | edit source]
- Version 5.0
- Codename Gandalf or Merlin 2
- Developed 2003, probably scheduled for release in 2005.
- Development started but project was later scrapped.