Can I share my usb keyboard between two computers

I love my Filco keyboard, I use it as primary keyboard for my Lenovo thinkpad all time. Now Im moving into the mac world and wonder:

is it possible to split my USB keyboard between two USB ports, ie one at my lenovo and one at my new iMac.

I was thinking that maybe there exists some kind of box with a switch to decide which port should receive the input, or preferable it would be possible to switch between the two via a keyboard shortcut.

Answer

I haven't used one that just does USB (USB switch) but I have used a few KVM switches^* and most of them allowed me to switch with a keyboard command.

^* _{You don't have to connect monitor and mouse to the KVM if you don't want to.}