MBASIC is the Microsoft BASIC implementation of BASIC for the CP/M operating system. MBASIC is a descendant of the original Altair BASIC interpreters that were among Microsoft's first products. MBASIC was one of the two versions of BASIC bundled with the Osborne 1 computer. The name "MBASIC" is derived from the disk file name of the BASIC interpreter.
Read more about MBASIC: Environment, PEEKs, POKEs, and User Functions, Successors To MBASIC, Importance of MBASIC, Other Uses