A more detail list of$os versions is possible.
For ideas look also to our script os.kix
from out site
http://home.wanadoo.nl/scripting
It returns to types:

• long name: os.version + os.productname + service.pack
  
• short name: os.version (f.e. W2K, NT4, W95, W98, ME)
  

Greetings.