I thought the Supersport came after the Z181 which I purchased in 1988. The historic documents suggest that it was the other way around but they list the Z181 as launching in 1993. No way. I started the student purchase program for my law school with Zenith Data Systems in 1987. I was waiting for the Z181 to be released. It came in '88. I kept it until the mid-1990s when I decided I could no longer live without a hard drive.