I've never seen Miniwriter I in a cartridge--I've only seen that one on Cassette or Disk for the Mini Memory. Mini Writer II came as a standard or a "+" version, with the "+" adding a parallel printer port to the front of the cartridge. I have both versions. The same went for the Mini Writer III (and sometimes the label didn't match the contents, as I have seen the "+" variant label on cartridges without the parallel port). These were followed by Wordwriter, Wordwriter Extra, and Beyond Wordwriter. Others in the series were planned, but never actually executed, so far as I've been able to determine. I have all of the ones that I've identified here. Console Calc (with the name later changes to TI Planner) also came in a standard and a "+" variant (for both Console Calc and TI Planner), with the "+" variant adding the parallel printer port. I have all four varieties.