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

Guy Lewis Steele, Jr.
GLS
Guy Steele

    (GLS) A software engineer whose most notable
   contributions to the art of computing include the design of
   Scheme (in cooperation with Gerald Sussman) and the design
   of the original command set of Emacs.  He is also known for
   his contribution to the Jargon File and for being the first
   to port TeX (from WAITS to ITS).  He wrote the book
   "Common Lisp", which virtually defines the language.

   He was working at Sun Microsystems, Inc. from 1996 to the
   present (June 2001).

   (2001-06-14)