Clipper

Clipper is a compiler that works to extend software that was originally created to work in MS-DOS through variants of xBase. A rather powerful general-purpose programming language, it was mostly used for database and business programs. 

Clipper is an xBase compiler that implements a variant of the xBase computer programming language. It is used to create or extend software programs that originally operated primarily under MS-DOS. Although it is a powerful general-purpose programming language, it was primarily used to create database/business programs.