What is a computer KVM switch used for?

A KVM (Keyboard, Video, Mouse) switch is a junction that allows you to use the same keyboard, video, and mouse on two or more computers. You plug the devices into the switch, and run the cables from it into each computer. Then you can switch between what computer you want to use with either a small switch, or certain key combinations. Its best used in large organizations where there are hundreds of computers to work with. It gives the network administrators the ability to efficiently and securely manage their information.