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 OS/2 2.0.
Microsoft later used OS/2 code to develop Windows NT 3.1. OS/2 code was later used by Serenity Systems to develop eComStation, which in turn was used by Arca Noae LLC to develop ArcaOS.
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 GUI. |
| OS/2 1.2 | 1.2 | Sloop | Released in 1989 |
| OS/2 1.3 | 1.3 | Cutter | Released in 1990 |
| OS/2 2.0 | 2.0 | Cruiser | Released in 1992-04 without Microsoft. |
| OS/2 2.00.1 | 2.00.1 | Riker | Released in 1992-10 |
| OS/2 2.1 | 2.1 | Borg (previously Yawl) | Released in 1993-05 |
| 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 |
| 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.