KVM, I'm guessing stands for Keyboard Video Mouse, if it doesn't, well, that seems like a good definition to me. Its a little box that you would plug your 1 keyboard, 1 mouse into, then it would have 1 area for a keyboard, video, and mouse, to go to computer A, and another area for keyboard, video, mouse, to go to computer b. That way, you can select "a" and when you press your keyboard or mouse, and it will affect computer a, when you move the switch on the box to "b" it will affect the other computer.
I have actually been looking for something like this. I was curious if there were any switches, that were solely for 2 USB ports. I have 2 computers, and 3 monitors, and it would be best for me if I could just use the one set of mouse/keyboard, but leave the displays alone. I'm guessing I could buy one that has monitor plugins, and just ignore them, but that would be kinda a waste. If anyone does know of something like this, do you mind linking it?