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

SIL

   1. "SIL - A Simulation Language", N. Houbak, LNCS 426,
   Springer 1990.

   2. SNOBOL Implementation Language.  Intermediate language
   forming a virtual machine for the implementation of portable
   interpreters.

   ["The Design of Transportable Interpreters", F. Druseikis,
   SNOBOL4 Project Document S4D49, U Arizona (Feb 1975)].

   Version 3.11.  (ftp://cs.arizona.edu/snobol4/).  E-mail:
   .

   (1986-07-29)