Twin PC

Full advantage of your PC’s computing power with the TwinPC.
With 2 monitors, 2 keyboards, 2 mice, and 2 sets of speakers, the TwinPC allows 2 users to log on and work simultaneously on the same system. 

Surf the Internet while another user watches a movie; play a full screen 3D game while someone else types a paper…all on a single machine! The TwinPC packs the power of 2 PCs into 1 affordable package.

http://www.duo-pc.com/twin-pc.html