The Bywater BASIC Interpreter (bwBASIC) implements a large superset of the ANSI Standard for Minimal BASIC (X3.60-1978) and a significant subset of the ANSI Standard for Full BASIC (X3.113-1987) in C.

BWBASIC is an original creation of Ted A. Campbell, who stopped working on it in 1993. Since then it has received contributions from other programmers: Jon B. Volkoff, Paul Edwards and Howard S. Wulf.

Inside program, type:

• help - show all commands available.
• help commandname - show help for a specific command.
• list - list source code for the program currently in memory
• run - executes the program in memory from the start.
• new - deletes the program in memory and clears all variables.
• load filename - loads an ASCII BASIC program into memory.
• save filename - saves the current program into the file "filename" in ASCII format.
• shell "command" - lets you run a SHELL or DOS command within bwbasic. For example, to list the contents of the current directory, in Linux type shell "ls -l", in Windows type shell "dir".
• quit - exits bwbasic.

The official repository is located at SourceForge. However, all available versions were transfered to GitHub, in order to create a history with the modifications of all versions. Some compiled versions are also available in the Releases section, with their respective source code.