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

PseudoScheme

   A translator from Scheme to Common Lisp by Jonathan Rees
   .  Version 2.8.  It conforms to all of
   R3RS except call/cc and requires Common Lisp.  Runs on
   Lucid, Symbolics CL, VAX Lisp, Explorer CL.

   Mailing list: info-clscheme-request@mc.lcs.mit.edu.

   (1994-10-28)