Source clipper?

Clipper was originally created in 1985 as a compiler for dBASE III, a very popular database language at the time. Compiling dBASE code changes it from interpreted code (i.e., human-readable source code), which must be interpreted every time each line of code is executed, to P-code (or pseudo-code), which uses a Virtual Machine to process the compiled P-code. P-code is considerably faster, but still not as fast as the machine code generated by native compilers. Clipper was created by Nantucket Corporation, and later sold to Computer Associates. On April 22, 2002 Computer Associates and GrafX Software announced they had reached a Development, Licensing, and Marketing Agreement for two of their software development languages -- CA-Clipper and CA-Visual Objects.