I have carried with me, for several years now, a copy of Windows NT Server and I have an old Dell Workstation that is of the same vintage. I never loaded it with Server because I did not understand that it would accept it. After all, the Dell was just a lowly Workstation.
Now I just have it because I just don't throw things that cost money away. At least until they get in the way and how can a small paperback manual and a disk ever get in the way.
I still have my first real computer. It is an old Gateway 2000, Model GP6-300 that runs at the blazing speed of 300MHz. All I use it for is to maintain a spreadsheet (Shopsmith Equipment Inventory), my old, old copy of AutiCad and Sketchup. It resides out in the dusty old workshop. Occasionally, I pull the sides off and blast it with some compressed air.
I have gone through three laptops in the time I have had that Gateway which nows runs on XP Pro.