http://hobbes.nmsu.edu/cgi-bin/...
"USB 1.1 Expanded Control Driver provides a device driver to directly control classless usb devices attached to an OS/2 system. Has been specifically designed to ease the development and test of simple homemade usb devices under OS/2. Uses standard/vendor control transfers and data (bulk/interrupt) transfers. Made in Holland by Wim Brul."
Source: OS2.jp