FIBEROPTIC CABLES, FIBEROPTIC TRANSMITTERS, FIBEROPTIC RECEIVERS, UNSHIELDED TWISTED PAIR TRANSMITTERS, UNSHIELDED TWISTED PAIR RECEIVERS, SHIELDED TWISTED PAIR TRANSMITTERS, SHIELDED TWISTED PAIR RECEIVERS, VIDEO CARDS, COMPUTER KEYBOARD SWITCHERS FOR CONNECTING ONE KEYBOARD TO SEVERAL COMPUTERS AT THE SAME TIME AND SWITCHING BETWEEN THE SEVERAL COMPUTERS IN ORDER TO OPERATE THE DESIRED COMPUTER WITH SAID KEYBOARD, COMPUTER MOUSE SWITCHERS FOR CONNECTING ONE MOUSE TO SEVERAL COMPUTERS AT THE...