That's one of the program modules for the 2nd gen Maxxums. They had different modules that would let you 'program' your camera for sports, portraits, etc.
It was supposed to let the amateurs get pro results by letting the camera do the settings according to the type of shot you were taking. Nowadays it's just built in, twist the dial or push the button to let the camera decide what to do.
A couple of a350's, an a700 and now an a580, plus even more lenses.