We have not reviewed all of them. Ugreen 2-port KVM/4-port USB switch: was $49.99 now $39.99 at Amazon This is the best-selling KVM switch on Amazon at the time of writing, one that can handle two ...

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 ...