What I'm saying is if you want to have a rocker switch where only up will turn the computer on and where only down will turn it off. It would not be a momentary switch, so the switch stays either up or down. Say the computer is off and you flip the switch up...the AND gate would need one input to be low (the 5V line, input held low by a resistor) because it's inverted and the other to be high (the 5 VSB from the switch) to trigger it's output and turn the computer on. Once the computer turns on, the 5V line would be high so the AND gate shuts off it's output. Similarly, you are using a second AND gate just to turn the computer off. If you used a momentary rocker switch with no logic circuitry, then pushing up once would turn the PC on, pushing up again would turn it off, and down would have no purpose (or be identical in function). Yes, a logic gate is an integrated circuit like an AND, OR, XOR, inverter, etc. Usually there are four to six complete logic gates in one IC. You could do it with a two input AND and an inverter on one of the inputs of the second AND. Of course there's more to it than just that. I'm just an amateur with electronics, so maybe an electrical engineer will help you out here. My advice if you are interested in this sort of thing, is to pick up some basic parts like logic gates, a power supply, and a decent beginners book and just do some experimenting. The parts won't cost you very much.