The Z-89 came with keyboard, monitor, CPU, 48K memory expandable to 64K, one built-in floppy disk drive and two serial ports. It ran the CP/M operating system.

It was introduced in 1979 and sold for about $2,895. In 1981, Heath/Zenith added CP/M to its product line and modified the Z-89 hardware so that it could boot up with either HDOS (Heath DOS) or CP/M.