A KVM (Keyboard, Video, Mouse) switch is a hardware device that allows users to control multiple computers from a single keyboard, video monitor and mouse.
Although multiple computers are connected to the KVM, typically a smaller number of computers can be controlled at any given time.
KVM switches are a must in large network setups with several servers.
There is no reason to take up space and go through the expense and hassle of setting up sixteen monitors and keyboards when you can get a sixteen-port KVM switch.