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What is OpenVMS? What is its history?

April 26, 2017History OpenVMS

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What is OpenVMS? What is its history?

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OpenVMS, originally called VMS (Virtual Memory System), was first conceived in 1976 as a new operating system for the then-new, 32-bit, virtual memory line of computers, eventually named VAX (Virtual Address eXtension). The first VAX model, the 11/780, was code-named “Star”, hence the code name for the VMS operating system, “Starlet”, a name that remains to this day the name for the system library files (STARLET.OLB, etc.). VMS version X0.5 was the first released to customers, in support of the hardware beta test of the VAX-11/780, in 1977. VAX/VMS Version V1.0 shipped in 1978, along with the first revenue-ship 11/780s. OpenVMS was designed entirely within HP and specifically within the former Digital Equipment Corporation (DIGITAL). Two of the principal designers were Dave Cutler and Dick Hustvedt, though with a wide variety of other contributors. OpenVMS was conceived as a 32-bit, virtual memory successor to the RSX- 11M operating system for the PDP-11.