1. Wayne Ratliff ca. 1980. CP/M port of JPLDIS which evolved into dBASE II.

2. The dBASE-like interpreter and compiler sold by RSPI with their Emerald Bay product.

3. Early string manipulation language. "VULCAN - A String Handling Language with Dynamic Storage Control", E.P. Storm et al, Proc FJCC 37, AFIPS (Fall 1970).

4. Kahn et al, Xerox PARC. Concurrent object orientation and logic programming. An object-oriented preprocessor for FCP. "Vulcan: Logical Concurrent Objects", K. Kahn et al in Research Directions in Object- Oriented Programming, A.B. Shriver et al eds, MIT Press 1987.