Ballmer Ribs Google's OS At Microsoft Conference (MSFT, GOOG)

"I don't know if they can't make up their mind or what the problem is over there. The last time I checked you don't need two client operating systems."

Only one of the readers at businessinsider came up with this list of MS operating systems (I don't know if they are all current):

* Windows XP
o Starter Edition (16 editions for each of 16 countries)
o Home Edition
o Home Edition N (European market)
o Home Edition K (South Korean market)
o Home Edition KN (South Korean market)
o Home Edition for Subscription Computers
o Home Edition for Prepaid Computers
o Professional Edition
o Professional Edition N (European market)
o Professional Edition K (South Korean market)
o Professional Edition KN (South Korean market)
o 64-bit Edition
o Professional x64 Edition
o Media Center Edition
o Tablet PC Edition
o XP for Embedded Systems
o XP Embedded
o Embedded for Point of Service
o Windows Fundamentals For Legacy PCs
* Windows Server 2003
o Small Business Server
o Web Edition
o Standard Edition
o Enterprise Edition
o Datacenter Edition
o Storage Server
o Windows Home Server
* Windows Vista
o Starter
o Home Basic
o Home Basic N (European market)
o Home Premium
o Business
o Business N (European market)
o Enterprise
o Ultimate
* Windows 7
* Windows Server 2008
o Web Server
o Standard Edition
o Enterprise Edition
o Datacenter Edition
o for Itanium-based Systems

Windows Mobile computing

* Windows CE
* Windows Mobile 6