GW-BASICS

GW-BASIC is a dialect of the BASIC programming language developed by Microsoft from BASICA, originally for Compaq. It is otherwise identical to Microsoft/IBM BASICA, but is a fully self-contained executable and does not need the ROM BASIC. It was bundled with MS-DOS operating systems on IBM PC compatibles by Microsoft. Microsoft also sold a BASIC compiler,
BASCOM, compatible with GW-BASIC,