Plan 9 from Bell Labs’s /usr/web/sources/patch/sorry/doc-man-4-usb-usbstart-usbprinter/files
/sys/man/4/usb usb /sys/src/cmd/usb/audio/usbaudio.c usbaudio.c /sys/src/cmd/usb/misc/mkfile mkfile /sys/src/cmd/usb/misc/usbmouse.c usbmouse.c /sys/src/cmd/usb/misc/usbprinter usbprinter