Trying to share a display between your desktop and your Xbox, or a keyboard between two PCs? A KVM switch is what you need. Here's how to choose the best switch, along with our top picks.

In the early 1990’s you could get a 4-port KVM which was little more than an AV-style switch. The transition of keyboards to USB brought with it a big upgrade to the KVM hardware. In 2000 ...