At 06:23 PM 1/15/99 -0500, you wrote: The thermal printer and RS-232 interface were both produced, but not in large numbers. They're hard to find. A few pieces of cartidge software (or as TI liked to call it, "Solid State Software") were produced, AFAIK, but also not in large numbers. I've never seen any in six years of looking. The tape drive, called a "Wafertape" drive, was pretty much vapourware. There were a few prototype units sold, but it was never in full production, because TI couldn't get the bugs worked out. The box for my CC-40 has a sticker attached that says "Tape drive not available". The lack of secondary storage pretty much doomed the CC-40 as a computer; it never caught on. I think there was an article in the book "The Best of 99'er Magazine" on how to build a cable to connect a CC-40 to a TI-99/4A. I also used mine as a programmable calculator. Cheers. Mark.