VAXELN

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VAXELN is a real-time operating system for the VAX family of computers produced by the Digital Equipment Corporation of Maynard, Massachusetts.

As with RSX-11 and VMS, Dave Cutler was the principal force behind the development of this operating system. He developed the product in tandem with the MicroVAX-I after moving to the Seattle, Washington area to form DECwest. VAXELN originally targeted the MicroVAX-I system but there was nothing constraining it from running on other VAX models.

[edit] Trivia

It was originally supposed to be named ELAN but DEC discovered at the last minute that it was trademarked in a European country where DEC wished to conduct business. The company holding the trademark to ELAN was the Slovenian sports equipment manufacturer Elan. In order to avoid litigation DEC quickly renamed it to VAXELN by dropping the A, alas the documentation had already been printed referring to the product as ELAN.