Why the question? other gadgets (iphone, ipod) have their own discussion (iphone 1st, 2nd, 3rd), even the PS3 (the "fat"(classic) and the slim. Here you consider the classic (gray) and the PSone (white). Mine is a 9001, the gray one.
http://en.wikipedia.org/wiki/PlayStation#History I'm sure everyone is familiar with the story, where the Playstation was originally supposed to be the SNES-CD. The history goes deeper in the wiki. Added note, the X in PSX meant eXperimental, a code name when it was still being developed for Nintendo.
In no particular order mine are: Bomberman Tekken 3 Gran Turismo 2 Hogs of War Sled Storm
What is your prefered way of playing burned games, using a mod or with a double disk swap? I never got very good at disk swaping, but I just bought a modded PS for $20 bucks. Anyone else playing PS anymore?