History
| SunOS version | Release date | Code base | Description |
|---|---|---|---|
| Sun UNIX 0.7 | 1982 | UniSoft UNIX v7 | Bundled with 68000-based Sun-1 system |
| SunOS 1.0 | 1983 | 4.1BSD | Support for 68010-based Sun-1 and Sun-2 systems |
| SunOS 1.1 | Apr 1984 | ||
| SunOS 1.2 | Jan 1985 | ||
| SunOS 2.0 | May 1985 | 4.2BSD | Introduced virtual file system (VFS) layer and the NFS protocol |
| SunOS 3.0 | Feb 1986 | 4.2BSD + System V IPC | coincided with release of 68020-based Sun-3 series. Optional System V tape offered utilities and development libraries. |
| SunOS 3.2 | Sep 1986 | Same as 3.0, plus some 4.3BSD | First support for Sun-4 series |
| SunOS 3.5 | Jan 1988 | ||
| SunOS 4.0 | Dec 1988 | 4.3BSD with System V IPC | New virtual memory system, dynamic linking, automounter, System V STREAMS I/O. Sun386i support. |
| SunOS 4.0.1 | 1988 | ||
| SunOS 4.0.2 | Sep 1989 | Sun386i only | |
| SunOS 4.0.3 | May 1989 | ||
| SunOS 4.0.3c | Jun 1989 | SPARCstation 1 (Sun-4c) only | |
| SunOS 4.1 | Mar 1990 | ||
| SunOS 4.1e | Apr 1991 | Sun-4e only | |
| SunOS 4.1.1 | Mar 1990 | Bundled with OpenWindows 2.0 | |
| SunOS 4.1.1B | Feb 1991 | ||
| SunOS 4.1.1.1 | Jul 1991 | ||
| SunOS 4.1.1_U1 | Nov 1991 | Sun-3/3x only | |
| SunOS 4.1.2 | Dec 1991 | Support for multiprocessor (SPARCserver 600MP) systems; first CD-ROM-only release | |
| SunOS 4.1.3 | Aug 1992 | ||
| SunOS 4.1.3C | Nov 1993 | SPARCclassic/SPARCstation LX only | |
| SunOS 4.1.3_U1 | Dec 1993 | ||
| SunOS 4.1.3_U1B | Feb 1994 | Earliest release for which Y2K compliance patches were available | |
| SunOS 4.1.4 | Nov 1994 | Last release of SunOS 4 | |
| SunOS 5.x | Jun 1992 - | SVR4 | See Solaris article |
SunOS 1 and 2 supported the Sun-2 series systems, including Sun-1 systems upgraded with Sun-2 (68010) CPU boards. SunOS 3 supported Sun-2 and Sun-3 (68020) series systems. SunOS 4 supported Sun-2 (until release 4.0.3), Sun-3 (until 4.1.1), Sun386i (4.0, 4.0.1 and 4.0.2 only) and Sun-4 (SPARC) architectures. Although SunOS 4 was intended to be the first release to fully support Sun's new SPARC processor, there was also a SunOS 3.2 release with preliminary support for Sun-4 systems.
SunOS 4.1.2 introduced support for Sun's first sun4m-architecture multiprocessor machines (the SPARCserver 600MP series); since it had only a single lock for the kernel, only one CPU at a time could execute in the kernel.
The last release of SunOS 4 was 4.1.4 (Solaris 1.1.2) in 1994. The sun4, sun4c and sun4m architectures were supported in 4.1.4; sun4d was not supported.
Sun continued to ship SunOS 4.1.3 and 4.1.4 until December 27, 1998; they were supported until September 30, 2003.
Read more about this topic: SunOS
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