/sources/plan9/386/bin/usb/
    203507 2014-05-16 audio
    221119 2014-05-16 disk
    208516 2014-05-16 ether
    158773 2014-03-18 kb
    144223 2014-02-06 print
       411 2013-05-01 probe
    212923 2014-05-16 serial
    322419 2014-05-16 usbd
      1097 2009-05-27 usbfat: