Human interface devices (HIDs)
Main article: USB human interface device class
Mice and keyboards usually have USB connectors. These can be used with older computers that have PS/2 connectors with the aid of a small USB-to-PS/2 adapter. Such adaptors contain no logic circuitry: the hardware in the USB keyboard or mouse is designed to detect whether it is connected to a USB or PS/2 port, and communicate using the appropriate protocol.
Joysticks, keypads, tablets and other human-interface devices are also progressively migrating from MIDI, and PC game port connectors to USB.[citation needed]
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Tue Apr 12, 2011 2:23 pm by sharif
Subject: Human interface devices (HIDs)