CP/M

CP/M Control Program/Monitor, later, Control Program for Microcomputers is an operating system that became available to the broad public in 1974 as part of the Intel 8080/85 microcomputers. It was first developed as a closed-source system and is now open source and at its core is a disk operating system.

The main and most important function of CP/M is file organization on magnetic storage devices, as well as loading of programs. It was first developed to operate on 8-bit processors allowing only single-tasking and up to 64k bytes of memory; it was later developed into 16-bit versions and multi-user.

‍