USB-B is the other end of a USB-A cable that plugs into the peripheral rather than plugging into the computer. But peripherals all started getting so small that

USB-B is the other end of a USB-A cable that plugs into the peripheral rather than plugging into the computer. But peripherals all started getting so small that they switched to USB-mini/USB-micro, and the only large peripherals left are printers, which is pretty much the only place you'll see it used. https://en.wikipedia.org/wiki/USB_hardware#Connectors https://en.wikipedia.org/wiki/USB_hardware#Connectors