"For the first time, you can hit your computer and get a
meaningful response! Using Linux and the Hard Drive Active
Protection System (HDAPS) kernel drivers, you can access the
embedded accelerometers on Lenovo (formerly IBM) ThinkPads, then
process the accelerometer data to read specific sequences of
'knocking' events--literally rapping on the laptop case with your
knuckles--and run commands based on those knocks. Double tap to
lock the screen, and knock in your secret code to unlock. Tap the
display lid once to move your mp3 player to the next track. The
possibilities are endless..."
Some of the products that appear on this site are from companies from which QuinStreet receives compensation. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. QuinStreet does not include all companies or all types of products available in the marketplace.