Hi, Strange as it sounds I need some reference material on why 2003 is better than NT4, all the books have lots on better security, better gizmos etc. but this isn't what I'm after as every book I have on 2000 & 2003 has all this stuff in spades. What I'm after is how for example 2000/2003 handles memory better, balances load over more CPU's better than NT4, why (and how?) 2003 handles more users without freezing up etc. Why? Lots of systems still on NT4, IIS V4.0 SQL 7.0 etc and need a powerful argument to move and an argument NOT just based on reliability, supportability (i.e. NT4 aint got none, yes I know you can get it until end 2006!! ) but based on behnd the scenes technical information, And hello everyone !! welcome me, my first post 6666