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MBASIC is a dialect of the BASIC programming language for the CP/M operating system. It was created by Microsoft in 1975, making it one of the earliest commercial products from the company. MBASIC provided simple syntax and commands allowing newcomers to learn how computers worked and experienced users to write complex programs. It supported string handling, integer arithmetic, subroutines with local variables, arrays, and direct memory manipulation—features that considerably improved upon earlier versions of BASIC. Its use was widespread in the microcomputer industry during the late 70s and early 80s as CP/M was one of the first operating systems for personal computers before being largely supplanted by MS-DOS after IBM chose that platform for its first PC in 1981.