Year Released | Product Version | Dev. Team Size | SLOC (Million) | Dev. Estimated Costs (Billion US Dollars) | Maint Estimated Costs (Billion US Dollars) |
July 1993 | Windows NT 3.0 | 200 | 4 - 5 | 10 | 28 |
Aug 1995 | Windows ‘95 | 450 | 7 - 8 | 18 | 47 |
June 1998 | Windows ‘98 | 800 | 11 - 12 | 23 | 58 |
Feb 2002 | Windows 2000 Professional | 1400 | 29+ | 32 | 72 |
Oct 2001 | Windows XP | 1800 | 45 | 40 | 86 |
April 2003 | Windows Server 2003 | 2000 | 50 | 48 | 102 |
Nov 2006 | Windows Vista | 2500 | 56 | 60 | 128 |
Oct 2009 | Windows 7 | 2700 | 67 | 75 | 161 |
Oct 2012 | Windows 8 | 3000 | 80 | 83 | 192 |