AvoK95 wroteA KVM is a switch, meaning you can use only 1 computer at a time. Whereas with the splitter Tarek is asking for is something that shows all of the screens in 1 monitor I'm guessing.
Allow me to disagree you, he said a switch "vga switch" "hdmi switch" which means one computer at a time. Check the pictures he posted, see the buttons? those are to choose which computer to show it's signal, so it is just like KVM but without keyboard and mouse :)
"I found an HDMI switch ( 4 input with one output ) in pc and parts ... I will see how this will turn out ."
good luck Tarek, keep us informed!