Is there any possible to record computer sound?

hey,
I wanna record inside computer sound without using mic is that possible?
maybe some good software you know?
Answer #1
http://www.google.co.uk/search?sourceid=chrome&ie=UTF-8&q=record+sound+inside+computer
Take your pick!
Answer #2
Answer #3
IF you mean sound what comes from computer like music.. or gamesounds you should try Virtual audio cable 4.1