High Quality Content by WIKIPEDIA articles! PROMAL, or PROgrammer's Microapplication Language is a C-like programming language from Systems Management Associates for MS-DOS, Commodore 64, and Apple II. PROMAL featured simple syntax, no line numbers, long variable names, functions and procedures with argument passing, real number type, arrays, strings, pointer, and a built-in I/O library. Like ABC and Python, indentation is part of the language syntax. The language used a single pass compiler to generate byte code that was interpreted when the program was run. Since the memory was very limited on these early home computers, the compiler could compile to/from disk and memory. The software package for C64 included a full-screen editor and command shell.