CP/M Programs — The First Business Operating System
CP/M (Control Program/Monitor), developed by Gary Kildall at Digital Research and first released in 1974, was the dominant operating system for personal computers from the late 1970s until MS-DOS displaced it in the mid-1980s. Running on Z80 and 8080/8085 processors, CP/M provided a standardised software environment that allowed programs to run on any CP/M-compatible machine regardless of manufacturer — an early and influential implementation of the software portability concept that would later define the IBM PC standard.
The CP/M software library included some of the most important business programs of the early computing era: WordStar (the dominant word processor of the late 1970s and early 1980s), dBASE II (which created the database software category), SuperCalc and VisiCalc (spreadsheets that made personal computers essential business tools), and hundreds of vertical market applications for accounting, legal practice, and scientific research. This collection of CP/M programs represents the professional computing infrastructure of the early 1980s — the software that made personal computers genuinely useful in business environments for the first time.
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