The Atari CX-85
Numeric Keypad

        Sensing a need to add a more serious numeric setup for its Atari 800 computer system, Atari introduced the Atari CX-85 numeric keypad which plugged into one of the available front joystick ports on the Atari 800 and using a special driver will allow the numeric keypad to be used with any Atari program or for programming in BASIC or other programming languages.   The numeric keypad was also packaged into 2 packages:  The Atari Bookkeeper and The Atari Accountant.

        Unfortunately Atari did not see the numeric keypad as a necessary part of a standard keyboard and this product was not incorporated into the Atari XL line of computers which would have given them a more serious and professional look.