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

Scheme-to-C
Scheme->C

    A Scheme compiler written in C that emits C
   and is embeddable in C.  Scheme-to-C was written by Joel
   Bartlett of Digital Western Research Laboratory.  Version
   15mar93 translates a superset of Revised**4 Scheme to C that
   is then compiled by the native C compiler for the target
   machine.  This design results in a portable system that
   allows either stand-alone Scheme programs or programs written
   in both compiled and interpreted Scheme and other languages.
   It supports "expansion passing style" macros, foreign
   function calls, records, and interfaces to Xlib (Ezd
   and Scix).

   Scheme-to-C runs on VAX, ULTRIX, DECstation, Alpha AXP
   OSF/1, Windows 3.1, Apple Macintosh 7.1, HP 9000/300,
   HP 9000/700, Sony News, SGI Iris and Harris
   Nighthawk, and other Unix-like 88000 systems.  The
   earlier 01nov91 version runs on Amiga, SunOS, NeXT, and
   Apollo systems.

   (ftp://gatekeeper.dec.com/pub/DEC/Scheme-to-C/).

   (2000-05-24)