Scm conforms to Revised^5 Report on the Algorithmic Language Scheme and the IEEE P1178 specification. Scm is written in C and runs under Amiga, Atari-ST, MacOS, MS-DOS, OS/2, NOS/VE, Unicos, VMS, Unix and similar systems. ASCII and EBCDIC are supported. Documentation is included explaining the many Scheme Language extensions in scm, the internal representation and how to extend or include scm in other programs. SLIB is a portable Scheme library which SCM uses. -- OpenBSD/FabBSD issues 1. Pathname dependencies: The init file is hardcoded as ${PREFIX}/share/scm/Init.scm. Alternatively, one can set the environment variable SCM_INIT_PATH to the pathname of Init.scm. The library files are in ${PREFIX}/share/scm/slib. Alternatively, one can set the environment variable SCHEME_LIBRARY_PATH to the slib directory. Remember to use a trailing / on the pathname. 2. Documentation: People not familiar with scheme may wish to install scheme-report as well. 3. Sicp compliance: Two interpreters, scm and scm-sicp, are compiled by default. scm conforms to R^5, scm-sicp to SCIP. If you don't know what I'm talking about, use scm.