- the MZ 711 was the "naked" model (without any peripheral),
- the MZ 721, has an integrated tape recorder
- the MZ 731, has built-in plotter and tape recorder).
- the fourth model was the MZ 780 which was actually a MZ 731 with a 80 columns card, a floppy disk drive and a Centronics port. It worked under CP/M.