aps(4) on OpenBSD

The text fe8cdbb12e2c, as OpenBSD 5.0, OpenBSD 4.9, OpenBSD 4.8, OpenBSD 4.7, OpenBSD 4.6, OpenBSD 4.5, OpenBSD 4.4, OpenBSD 4.3 shipped it.

ThinkPad Active Protection System accelerometer