Hewlett Packard 54620/54640 series Oscilloscope (included game)

The Hewlett Packard 54620/54640 series Oscilloscopes include a game as an Easter egg or, at least, undocumented feature. The game is summoned when pressing the second and third softkeys simultaneously.

The game is a variant of Asteroids. The player controls a space ship and can fly around the screen. The player must dodge incoming asteroids and is equipped with a laser cannon which can be used to shoot the lasers and turn them into ever smaller pieces.