The Free On-line Dictionary of Computing (30 December 2018):

LOWL

    The abstract machine for bootstrapping ML/1,
   developed by P.J. Brown of the University of Kent at
   Canterbury.

   ["Macro Processors and Techniques for Portable Software",
   P.J. Brown, published by Wiley, ISBN 0.471.11005.1].

   [Mentioned in "Machine Oriented Higher Level Languages",
   W. van der Poel, N-H 1974, p. 271].

   [What does LOWL stand for?]

   (1997-11-04)