Zortech C

The tool was originally delivered as C only compiler for DOS called Datalight C, then the British company Zorland took over the distribution and it was renamed Zorland C, and was aimed squarely at the budget end of the market, after a legal threat from Borland the name was changed to Zortech and rudimentary C++ capabilities were added.

Datalight Optimum C

1986
1988: 3.11

Zorland C

1987: 2.0