Burroughs MCP

MCP
DeveloperBurroughs / Unisys
Written inESPOL, NEWP
Working stateCurrent
Source modelSource available
Initial release1961; 63 years ago (1961)
Latest release20.0[1] / May 2021
PlatformsBurroughs large systems including the Unisys Clearpath/MCP
Default
user interface
Text user interface
LicenseProprietary
Official websiteUnisys ClearPath

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.

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.

  1. ^ "ClearPath MCP Software: Software Release Announcement ClearPath MCP 20.0" (PDF). Unisys. May 2021. Retrieved 2021-08-14.