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   CA-Clipper is a programming language that allows to create a database,
   manipulate it and define the applications that will access the data.

   CA-Clipper was born as a compiler for the dBase language with the purpose
   of creating stand-alone applications running on PCs without dBase
   installed. It then evolved into a true programming language. In the later
   versions different functionalities and enhancements were introduced making
   it a de facto standard for the development of applications in DOS
   environment.

   The program instructions, written in Clipper with a text editor, are saved
   in one or more files having the .PRG extension. This extension
   indicates source program files.

   The compiler, Clipper, translates the program instruction into a code
   understandable by the computer, the machine code. After translation,
   Clipper will save the translation into a new file, which has the same name
   as the program source file but the .OBJ extension.

   The linker will then link the different .OBJ files and create a new file
   called the executable file. This file will have the .EXE extension.
   The file is called executable file because it can be executed as a
   stand-alone program in DOS.