Abstract: The invention provides a Software Development Program having a compiled programming language, Compiler for that language, and a built-in text Editor. The programming language has a block structure and simple syntax. The Software Development Program is distributed free to developers, but programs created with the Software Development Program must be licensed. In addition to machine-readable Object Code, Executable Files created with the Compiler include the embedded Source Code (including independent function libraries that help form an Executable Shell) from which they were created. Separate Source Code and Object Code files are not required. The Compiler edits the Executable Files directly, thereby eliminating the need for source code control.