The following list contains an index of the major build and version numbers for a few Microsoft products. This list is primarily for the Office Server System (OSS) developer so it doesn't cover all Microsoft products. It's a work in progress... if you would like to contribute, please post to the comments of this article and include a citation where the version number can be validated.
Why create a list like this? Because I have needed it numerous times in the past and frankly I'm sick of having wade through my stack of books or the incredibly hard-to-find-things Microsoft knowledge base. Maybe it will help someone else, but it will now be easy for me to find from anywhere.
.NET Framework
| v 1.0 | 1.0.3705 |
| v 1.1 | 1.1.4322 |
| v 2.0 | 2.0.50727 |
SQL Server (v7-present)
| v 7 RTM | 7.00.623 |
| v 7 SP1 | 7.00.699 |
| v 7 SP2 | 7.00.842 |
| v 7 SP3 | 7.00.961 |
| v 7 SP4 | 7.00.1063 |
| v 2000 RTM | 8.00.194 |
| v 2000 SP1 | 8.00.384 |
| v 2000 SP2 | 8.00.532 |
| v 2000 SP3/3a | 8.00.760 |
| v 2000 SP4 | 8.00.2039 |
| v 2005 | 9.00.1399 |
| v 2005 SP1 | 9.00.2047 |
| v 2005 SP1 + KB918222 | 9.00.2153 |
| v 2005 SP2 | 9.00.3042 |
Content Management Server (MCMS)
| v 2001 RTM | 4.1.942.0 |
| v 2001 SP1 | 4.1.942.100 |
| v 2001 SRP1* | 4.1.942.308 |
| v 2001 SRP2* | 4.1.1106.0 |
| v 2002 RTM | 5.0.1581.0 |
| v 2002 SP1 | 5.0.2284.0 |
| v 2002 SP1a | 5.0.4484.0 |
| v 2002 SP2 | 5.0.5054.0 |
SharePoint v2 (WSS v2 & SPS 2003)
| WSS v2 RTM | 6.0.2.5530 |
| WSS v2 SP1 | 6.0.2.6361 |
| WSS v2 SP1 + KB887981 | 6.0.2.6411 |
| WSS v2 SP2 | 6.0.2.6568 |
| WSS v2 post SP2 rollup (KB900929) | 11.0.8000.0 |
| SPS 2003 RTM | 11.0.5704.0 |
| SPS 2003 SP1 | 11.0.6715.0 |
| SPS 2003 SP2 | 11.0.8126.0 |
| SPS 2003 post SP2 rollup (KB897722) | 11.0.8126.2 |
SharePoint v3 (WSS v3 & MOSS 2007) **
| WSS v3 & MOSS 2007 RTM | 12.0.0.4518 |
| WSS v3 & MOSS 2007 SP1 | 12.0.0.6219 |
| WSS v3 & MOSS 2007 Infrastructure Updates | 12.0.0.6318 |
| WSS v3 & MOSS 2007 August 2008 Cumulative Rollup | 12.0.0.6327 |
| WSS v3 & MOSS 2007 October 2008 Cumulative Rollup | 12.0.0.6331 |
Be sure to check Spencer Harbar's killer Post SP1 page with links to all the hotfixes and version numbers... more than I have here.
* SRP = Security Rollup Package
** - SharePoint v3's architecture is such that MOSS is treated more or less like a feature pack, thus the underlying versions are the same between WSS v3 & MOSS 2007
[Updated 12/15/2005] Added WSS & SPS post-SP2 rollup updates.
[Updated 5/22/2006] Added SQL 2005 SP1 & post SP1 hotfix KB918222
[Updated 5/26/2006] Fixed CMS 2001 SRP1 & SRP2 & SP2 (there was no SP2 for CMS 2001, rather two SRP's for SP1). Thanks to Stefan for pointing this out.
[Updated 12/13/2008] Added all the major updates and security rollups for SharePoint v3.