Burroughs MCP

The MCP (Master Control Program) is the operating system of the Burroughs B5000/B5500/B5700 and the B6500 and successors, including the Unisys Clearpath/MCP systems.

"Master Control Program" redirects here. For the fictional villain from the film "Tron", see Master Control Program (Tron).
MCP
DeveloperBurroughs / Unisys
Written inESPOL, NEWP
Working stateCurrent
Source modelSource available
Initial release1961 (1961)
Latest release20.0 / May 2021
PlatformsBurroughs large systems including the Unisys Clearpath/MCP
Default
user interface		Text user interface
LicenseProprietary
Official websiteUnisys ClearPath

MCP was originally written in 1961 in ESPOL (Executive Systems Problem Oriented Language). In the 1970s, MCP was converted to NEWP which was a better structured, more robust, and more secure form of ESPOL.

The MCP was a leader in many areas, including: the first operating system to manage multiple processors, the first commercial implementation of virtual memory, and the first OS written exclusively in a high-level language.

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