The Collaborative International Dictionary of English v.0.48:

Vulcan \Vul"can\, n. [L. Vulcanus, Volcanus: cf. Skr. ulk[=a] a
   firebrand, meteor. Cf. Volcano.] (Rom. Myth.)
   The god of fire, who presided over the working of metals; --
   answering to the Greek Hephaestus.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Vulcan
    n 1: (Roman mythology) god of fire and metal working;
         counterpart of Greek Hephaestus

The Free On-line Dictionary of Computing (19 January 2023):

VULCAN

   1.  A version of JPLDIS ported to CP/M by Wayne
   Ratliff around 1980.  VULCAN evolved into dBASE II.

   2.  The dBASE-like interpreter and compiler
   sold by RSPI with their Emerald Bay product.  [Same as 1?]

   3.  An early string manipulation language.

   ["VULCAN - A String Handling Language with Dynamic Storage
   Control", E.P. Storm et al, Proc FJCC 37, AFIPS, Fall 1970].

   4.  A concurrent object-oriented logic
   programming language implemented as a preprocessor for
   FCP by Kahn et al at Xerox PARC.

   ["Vulcan: Logical Concurrent Objects", K. Kahn et al in
   Research Directions in Object- Oriented Programming,
   A.B. Shriver et al eds, MIT Press 1987].

   (2004-09-01)