/vaks/
n. 1. [from Virtual Address eXtension]
The most successful minicomputer design in industry history, possibly excepting its immediate ancestor, the PDP-11. Between its release in 1978 and its eclipse by killer micros after about 1986, the VAX was probably the hacker's favorite machine of them all, esp. after the 1982 release of 4.2 BSD UNIX (see BSD). Esp. noted for its large, assembler-programmer-friendly instruction set -- an asset that became a liability after the RISC revolution.