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Burroughs MCP Maintenance

Burroughs MCP
KindOperating system
Appeared1961
StatusMaintenance
CreatorBurroughs → Unisys
FamilyMCP
PlatformBurroughs B5000 → ClearPath
Also known asClearPath MCP
Sourceen.wikipedia.org ↗

The first OS written in a high-level language (ESPOL, an ALGOL dialect) — stack-machine guardians and tagged memory in 1961; still sold today as Unisys ClearPath MCP.

Ran on Burroughs B5000
Created by Burroughs Corporation

Burroughs MCP shipped with the B5000 in 1961 — the first OS written in a high-level language (ALGOL, when that was heresy), the first with virtual memory in production, and the first job-scheduling system on a stack machine.\n\nIts line is continuous: ClearPath MCP on Unisys hardware today is a direct descendant — arguably the oldest continuously-running operating-system lineage in existence.

Sources

  1. en.wikipedia.org/wiki/Burroughs_MCP