I live in 2 floors house, my bedroom is right above a room with a computer, printer, and fax machine. am i safe from the radiation?

Probably.: We are exposed to radiation every day, not just from manmade devices but from the environment. If you were not safe with those 3 on the floor before you, I am doomed (as are a lot of people) since we are around these things most of the time every day. To understand radiation see http://en.wikipedia.org/wiki/Background_radiation Also see http://www.physics.isu.edu/radinf/risk.htm