This is ADB Probe 1.2, which replaces version 1.0.3. ADB Probe was written by Robert Polic (of SCSI Probe fame). It will show you the type of ADB (Apple Desktop Bus) devices that you have connected to your Macintosh (sorry, pre-SE Macs do not have ADB, so this does nothing for them). It also will allow you to reset the ADB chain, in case something's gone wrong (like your keyboard stopped working :-). Freeware. An essential Control Panel (CDev) utility.