The Atari Program Exchange (APX) was an interesting experiment in the early 1980s. Everyone who purchased an Atari 400 or 800 computer received a subscription to the APX catalog of "user-written" software, programs written by other people who had purchased Atari computers.

Number Blast by Richard Wiitala. Tested and works, comes with manual though manual comes without staples.

No stock images, all pictures are originals of the product.