!!!Synapse SynCalc Versions 1983 1985 1993 1985 Version From p. 5 of the documenation: "What You Will Need 1. An ATARI home computer 2. An ATARI disk drive (up to 2). 3. The program diskette, enclosed in the inside front cover pocket of the manual. 4. At least 48K of memory. 5. A TV set or other video monitor. A black and white set will work. 6. Blank diskettes for storing data. Optional: ATARI printers for obtaining hard copy versions of reports. You can also use the Axlon Rampower 128K or Mosaic 64K Select to increase your computer's capacity."