This is what the word "bus" used to mean on a hardware level: a backplane of connections to which multiple peripherals could be attached. These days a bus is a

This is what the word "bus" used to mean on a hardware level: a backplane of connections to which multiple peripherals could be attached. These days a bus is a LAN of point-to-point serial connections which, it turns out, is much more viable at the high communication rates demanded of modern hardware.