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A real-time operating system for VAXs from HP (via Digital and Compaq) that provided application development in Pascal and other languages. Tools for developing VAXELN applications ran under VMS, and system images of the resulting programs were downloaded into the target computers. After 22 years (1977-1999), the VAX platform reached end-of-life status, with support continued by HP through 2010. See VAX.


(Virtual Address eXtension) A venerable family of 32-bit computers from HP (via Digital and Compaq) introduced in 1977 with the VAX-11/780. VAX models ranged from desktop units to mainframes all running the same VMS operating system, and VAXes could emulate PDP models (Digital's first computers). Large VAX multiprocessing clusters served thousands of users.

A Very Successful Computer Line
Throughout the 1980s, software compatibility among all models caused the VAX family to achieve outstanding success for Digital. The last VAX order was taken in 1999 (for VAXstation 4000s), 22 years after the first VAX. HP supported OpenVMS on VAX through 2010 while offering migration to its 64-bit Alpha platform.

The Vax 11/780
The VAX series was an outstanding success and made Digital a major competitor of computers in all sizes from workstation to mainframe in the 1980s. This is the first VAX. (Image courtesy of Digital Equipment Corporation.)

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variable length recordVAXmate
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variable resistorVB Script
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