ums(4) on FreeBSD
The text 91572041e4d1, as FreeBSD 6.2-RELEASE, FreeBSD 6.1-RELEASE, FreeBSD 6.0-RELEASE shipped it.
USB mouse driver
The text 91572041e4d1, as FreeBSD 6.2-RELEASE, FreeBSD 6.1-RELEASE, FreeBSD 6.0-RELEASE shipped it.
USB mouse driver