Template:Release history table
| ITOS Version | Maemo | Codename | Release | Release date | Notes |
|---|---|---|---|---|---|
| OS2005 | 1.1 | - | 2.2005.45-1 | November 2005 | |
| 3.2005.51-13 | December 2005 | ||||
| 5.2006.13-7 | April 2006 | ||||
| OS2006 | 2.0 | Mistral | 0.2006.22-21 | May 2006 | Beta release |
| 1.2006.26-8 | May 2006 | ||||
| 2.1 | Scirocco | 2.2006.39-14 | November 2006 | ||
| 2.2 | Gregale | 3.2006.49-2 | January 2007 | ||
| OS2007 | 3.0 | Bora | 2.2006.51-6 | January 2007 | |
| 3.1 | 3.2007.10-7 | March 2007 | |||
| 3.2 | 4.2007.26-8 | July 2007 | |||
| 4.2007.38-2 | October 2007 | SDHC corruption fix | |||
| OS2008 | 4.0 | Chinook | 1.2007.42-18 | November 2007 | (N810 only) |
| 1.2007.42-19 | November 2007 | Kernel upgrade only (N810 only) | |||
| 1.2007.44-4 | November 2007 | Beta release (N800 only) | |||
| 2.2007.50-2 | November 2007 | ||||
| 2.2007.51-3 | January 2008 | NOLO upgrade only | |||
| 4.1 | Diablo | 4.2008.23-14 | June 2008 | Adds SSU support | |
| 4.1.1 | 4.2008.30-2 | August 2008 | First SSU update | ||
| 4.1.2 | 4.2008.36-5 | September 2008 | Second SSU update | ||
| 4.1.3 | 5.2008.43-7 | December 2008 | Third SSU update | ||
| Maemo 5 | 5.0 | Fremantle | 1.2009.42-11 | November 2009 | Bundled community-supported Qt libraries |
| 1.2009.44-1 | December 2009 | ||||
| 5.0 PR1.1 | 2.2009.51-1 | January 2010 | 3UK SIM and MS Exchange 2003 support | ||
| 5.0 PR1.1.1 | 3.2010.02-8 | February 2010 | |||
| 5.0 PR1.2 | 10.2010.19-1 | May 2010 | Bundled officially-supported Qt libraries | ||
| MeeGo-Harmattan (provisional name) | - | Harmattan | - | - | Merge with Moblin to form MeeGo |