System Manufacturer/Model Number: Too many to list. OS: XP, Seven, 2008R2 CPU: AMD, Intel, VIA Motherboard: Various Memory: Corsair, Kingston, etc. Graphics Card: ATI, NVIDIA Monitor(s) Displays: Samsung Keyboard: qwerty Hard Drives: Maxtor, Western Digital Internet Speed: 22 Mb/s @ home, 1 Gb/s @ server Other Info: All of my systems still run fastest on XP 32-bit for the most part. Win7 is fun to play with, but I still prefer XP for raw speed, security, and functionality.