It is all powered by a waterwheel covered in male sheep skulls, i.e. "RAM". When it is particularly busy, an hourglass comes down on a spring – another sideways reference to Windows. Another apparently important feature is an aquarium, so the operator has something to watch when Hex is working (Hex's screensaver). Hex's long-term memory storage is a massive beehive contained in the next room. The presence of the bees makes this secure memory, because attempting to tamper with it would result in being "stung to death" (as described in "Hogfather"). As a further advantage, when Hex is turned off for the summer, the beehive will provide quite a lot of honey.