Danny Amor's Online Library/Danny Amor's Online Library - Volume 1.iso/html/faqs/faq/scheme-faq/part2

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Subject: FAQ: Scheme Implementations and Mailing Lists 2/2 [Monthly posting]
Newsgroups: comp.lang.scheme,comp.lang.lisp,news.answers,comp.answers
From: [e-mail] (Mark Kantrowitz)
Date: 13 Nov 1994 08:03:05 GMT

Archive-name: scheme-faq/part2
Last-Modified: Thu Nov  3 13:59:54 1994 by Mark Kantrowitz
Version: 1.15
Maintainer: Mark Kantrowitz and Barry Margolin <[e-mail]>
URL: http://www.cs.cmu.edu:8001/Web/Groups/AI/html/faqs/lang/scheme/top.html
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;;; ****************************************************************
;;; Answers to Frequently Asked Questions about Scheme *************
;;; ****************************************************************
;;; Written by Mark Kantrowitz and Barry Margolin
;;; scheme_2.faq

This post contains part 2 of the Scheme FAQ.

If you think of questions that are appropriate for this FAQ, or would
like to improve an answer, please send email to us at [e-mail].

Topics Covered (Part 2):
  [2-1]   Free Scheme implementations.
  [2-2]   Commercial Scheme implementations.
  [2-3]   What Scheme-related discussion groups and mailing lists exist?

Search for \[#\] to get to question number # quickly.

----------------------------------------------------------------
Subject: [2-1] Free Scheme implementations.

Repositories of Scheme source code are described in the answer to
question [1-9].

Remember, when ftping compressed or compacted files (.Z, .z, .arc, .fit,
etc.) to use binary mode for retrieving the files.

Files that end with a .z suffix were compressed with the patent-free
gzip (no relation to zip). Source for gzip is available from:
   prep.ai.mit.edu:/pub/gnu/
as the files gzip-1.2.3.shar, gzip-1.2.3.tar,or gzip-1.2.3.msdos.exe.

Repositories of Scheme implementations:

   Many free Scheme implementations are available from swiss-ftp.ai.mit.edu
   [18.43.0.246]. See also the Scheme Repository described below.

   The Scheme Repository contains a Scheme bibliography, copies of the
   R4RS report, sample Scheme code for a variety of purposes, several
   utilities, and most free implementations.  (Implementations of Scheme
   available from the repository include elk, gambit, scm, fools, rabbit,
   s48, scheme84, scheme88, pseudo, xscheme, umb-scheme, siod, vscm, and
   pixiescheme.) The repository was established by Ozan S. Yigit and
   is currently maintained by David Eby and John Zuckerman
   <[e-mail]>. The repository is
   accessible by anonymous ftp at
      ftp.cs.indiana.edu:/pub/scheme-repository/   [129.79.254.191]
   The repository is mirrored in INRIA, courtesy of Christian Queinnec
   [Ecole Polytechnique and INRIA-Rocquencourt], ftp.inria.fr:/lang/Scheme.
   (See also [1-9].)

Scheme implementations:

   BIGLOO is a Scheme interpreter and compiler. It conforms to the
   IEEE-Scheme standard (IEEE P1178) with some extensions, such as
   regular expression parsing (RGC), a lexical analyzer generator, a full
   foreign function interface, and a pattern matching compiler.  Bigloo
   can also compile modules written in Caml (an ML dialect), letting you
   mix Scheme, ML, and C.  Object-oriented programming is provided by
   Meroon v3. The main goal of Bigloo is to deliver small and fast stand
   alone applications.  Bigloo produces ANSI C and hence should be easy
   to port. It runs on Sparc (1, 2, 10), SONY-NEWS (MIPS R3000), IRIS
   Indigo (MIPS R3000), Sun 3/60, DecStation 3100, PC-486 (linux), and
   HP-PA (730).  It is available by anonymous ftp from
      ftp.inria.fr:/INRIA/Projects/icsla/Implementations/ [192.93.2.54]
   as the files bigloo1.6.tar.gz and camloo0.0.tar.gz.
   For further information, send email to [e-mail], or
   write to Manuel Serrano (equipe ICSLA, Bat 8), INRIA-Rocquencourt,
   BP 105, 78153, Le Chesnay CEDEX, FRANCE, or call 39-63-57-32.

   Elk (Extension Language Kit) is a Scheme interpreter designed to be
   used as a general extension language for applications written in C or
   C++. Elk can also be used as a stand-alone implementation of the
   Scheme programming language. It is mostly R4RS and P1178 conformant
   (with the exception of the number system and a few minor details).  It
   has interfaces to Xlib, Xt, and the Athena and OSF/Motif widget sets.
   It includes dynamic incremental linking of C object files, an optional
   foreign function interface, and a generational garbage collector (by
   Marco Scheibe <[e-mail]>). It can also dump an image of a
   fully customized application into a new executable file. Elk is
   available by anonymous ftp from
      tub.cs.tu-berlin.de:/pub/elk/
   It is also available from the Scheme Repository in
      ftp.cs.indiana.edu:/pub/scheme-repository/imp/
   and in the X contrib directory on ftp.x.org (formerly export.lcs.mit.edu).
   Runs on Unix, SunOs, and Ultrix based platforms, including VAX,
   Sun3, Sun4 (Sparc), 680x0, 80386, MIPS, IBM RT, IBM RS/6000,
   HP9000/700, SGI, and Sony NEWS. Implemented by Oliver Laumann
   <[e-mail]> and Carsten Bormann <[e-mail]>.

   FDU Scheme is a R3RS implementation of Scheme for the Prime
   50-series under Primos. It is available by anonymous ftp from
   fdumad.fdu.edu [132.238.1.1] (username "anonymous", password
   <RETURN>). Attach to the Scheme subdirectory (cd '*>scheme') and
   transfer all files in it and its subdirectories using file type
   binary.  For more information, contact Peter Falley,
   <[e-mail]>.

   Fools' Lisp is a small Scheme interpreter that is R4RS conformant, and
   is available by anonymous ftp from
      scam.berkeley.edu:/pub/src/local/fools.1.3.2.tar.Z [128.32.138.1]
   Fools' Lisp runs on Sun3 and Sun4 (SunOs), DecStation 3100s, Vax
   (Ultrix), Sequent, and Apollo. Implemented by Jonathan Lee
   <[e-mail]>.

   Gambit is an optimizing Scheme compiler/system. It conforms to the
   IEEE-Scheme standard (IEEE P1178) and the Revised^4 Report on Scheme
   (R4RS). The system supports the whole numeric tower (i.e. integer,
   rational, real and complex numbers). It also has several extensions to
   the standards including: weak pairs, string ports, property lists,
   futures, pretty printer, debugger, compiler and multitasking. Gambit
   runs on M680x0 based machines only (including Sun3, Apollo,
   HP9000/3xx, BBN GP1000 multiprocessor, Amiga, NeXT, and the Apple
   Macintosh). The latest version for UNIX based machines (including the
   Macintosh running A/UX) is release 1.9. The latest version for the Mac
   running the normal System/Finder is MacGambit release 1.9.1. The
   distribution contains the interpreter and optimizing native code
   compiler and all the sources required to build the system (the sources
   for MacGambit are for THINK-C 5.0). MacGambit's specific features
   include: a Scheme interface to several Toolbox routines (mostly
   QuickDraw), a drawing window for simple graphics, an online help
   system containing R4RS and a Scheme oriented editor with an emacs
   compatibility mode. Gambit Scheme is available by anonymous ftp from
      ftp.iro.umontreal.ca:/pub/parallele/gambit/ [132.204.32.22]
   Versions 1.7, 1.7.1, 1.8.2, 1.9.1 and 2.0 may be found in this
   directory. Version 2.0 is in the files gambit20.tar.Z (Unix source),
   macgambit-2.0-interpreter.hqx (MacGambit interpreter),
   macgambit-2.0-sources1.hqx (sources needed to build the interpreter
   using Think-C 5.0), and macgambit-2.0-sources2.hqx (Scheme source
   files for runtime and compiler, and DEC's Thomas interpreter).
   Copies may also be found in the Scheme Repository on
   ftp.cs.indiana.edu:/pub/scheme-repository/imp/, but the most recent version
   will always be available from ftp.iro.umontreal.ca. MacGambit may also be
   obtained from the directory
        /afs/umich.edu/group/itd/archive/mac/development/languages/
   if your site runs the Andrew File System, or by anonymous ftp from
   mac.archive.umich.edu. For more information about Gambit, send email
   to [e-mail]. Gambit Scheme was written by Marc
   Feeley <[e-mail]>. Gambit for UNIX and MacGambit are
   copyright 1992, Universite de Montreal. The programs may be
   distributed to others as long as they are not sold or transferred for
   compensation (other than a reasonable duplication fee).

   HELP (a lazy Scheme) is available by anonymous ftp from
   sumex-aim.stanford.edu:/info-mac/lang/lazy-scheme.hqx.  Written by
   Thomas Schiex ([e-mail], [e-mail]). Help is a complete and
   efficient Scheme-like functional lazy Lisp interpreter.  It works only
   on 68020 (or more) based Macintoshes. It has a 'friendly' interface
   (parenthesis matcher, auto-indent), uses a full call-by-need semantics
   and includes many examples, including a symbolic compiler for the
   680x0. Efficiency is good and lazyness is fully parametrizable (you
   may turn Help into a strict Scheme-like language if you like). French
   AND English updated docs are included in Word4 and plain text formats.

   LIBSCHEME is a C library implementing Scheme as described in R4RS.  It
   is easily integrated into a C program as a command interpreter or
   extension language, and is easily extended in C with new primitive
   types, primitve functions and syntax.  It should be portable to most
   machines with an ANSI C compiler. It is available by anonymous ftp
   from
      ftp.cs.indiana.edu:/pub/scheme-repository/imp/
   For more information, write to Brent Benson
   <[e-mail]>.

   MIT Scheme (aka C-Scheme), is available free by anonymous FTP from
      martigny.ai.mit.edu:/archive/scheme-7.3 [18.43.0.152]
   Version 7.3 is a beta version and runs on DEC Alpha, DECStation
   (MIPS), HP 9000 300/400/700, IBM RS-6000, Intel i386/i486 (DOS, NT,
   Windows 3.1, or Linux), NeXT (NeXTOS 2 or 3), SGI (MIPS), Sony NEWS
   (MIPS), Sun3 (SunOS 4.1) and Sun4 (SunOS 4.1).  Bugs should be
   reported to [e-mail] (for the DOS version, send
   bug reports to [e-mail]).  MIT Scheme
   includes Edwin (Scheme's Emacs-like editor) and Liar (the Scheme
   compiler). Does not have a convenient foreign function interface yet.
   FTP distribution includes MIT C-Scheme Reference and User manuals, as
   well as the Revised^4 Report on Scheme. Discussion occurs on the
   newsgroup comp.lang.scheme.c (gatewayed to the mailing list
   [e-mail]). For DOS floppy distribution requests
   (includes printed copies of manuals), send $95.00 (payable in U.S.
   funds to "Scheme Distribution") to cover costs of distribution to
   Scheme Distribution, c/o Prof. Hal Abelson, 545 Technology Sq. rm 410,
   Cambridge MA 02139, USA.
   |
   On the NeXT, MIT Scheme is available as part of the Schematik
   package, which provides an editor/front-end user interface,
   graphics, and "robotics" support for Lego and the like.  Schematik is
   free and is available for anonymous ftp from
      ftp.gac.edu:/pub/next/scheme/
   Europeans can get it more locally from
      ftp.informatik.uni-muenchen.de:/pub/next/ProgLang/
   start with Schematik-1.1.5.1.README .  Schematik is also apparently
   included on NeXT's "Educational Software Sampler" CD-ROM.
   |
   A preliminary unofficial port of C-Scheme to the Linux is available
   from artemide.dei.unipd.it:/linux/scheme-7.2/. Contact the author
   Matteo Frigo <[e-mail]> for more information.

   Oaklisp is an seamless integration of Scheme with an object-oriented
   substrate. Available by anonymous ftp from
      f.gp.cs.cmu.edu:/usr/bap/oak/ftpable/ [128.2.250.164]
   or from
      ftp.cs.cmu.edu:/afs/cs.cmu.edu/user/bap/oak/ftpable/
   and includes reference and implementation manuals. Written by Barak
   Pearlmutter <[e-mail]> and Kevin Lang <[e-mail]>.

   PC-Scheme (aka PCScheme, PC Scheme) is an implementation of Scheme
   originally written by Texas Instruments. TI made a version of the
   source code freely distributable in 1987. TI stopped supporting
   the code, and some researchers at the University of Geneva produced
   a cleaned-up version (see PCS/Geneva below). On July 13, 1992, Ibuki
   announced that it had purchased the rights to PC Scheme from TI.
   Please see the Ibuki PC Scheme entry in [2-2]. If you want a
   high-quality and supported implementation of PC Scheme, buy the
   Ibuki implementation. It is certainly inexpensive enough. Now TI
   PC-Scheme is available by anonymous ftp from
      swiss-ftp.ai.mit.edu:/archive/pc-scheme/
   and runs on MS-DOS 286/386 IBM PCs and compatibles. Version 3.3
   should run on the 486, but no guarantees. Version 3.3 is the last
   free version. TI PC-Scheme conforms to the Revised^3 Report on Scheme.
   It includes an optimizing compiler, an emacs-like editor, inspector,
   debugger, performance testing, foreign function interface, window
   system and an object-oriented subsystem. It also supports the dialect
   used in Abelson and Sussman's SICP.

   PCS/Geneva is a cleaned-up version of Texas Instrument's PC Scheme
   developed at the University of Geneva. The main extensions to PC
   Scheme are 486 support, BGI graphics, LIM-EMS pagination support, line
   editing, mouse support, assembly-level interfacing, and several
   powerful Scheme-oriented editors. (TI's PC Scheme gives users full
   Revised^3 support along with many primitives for DOS, Graphics and
   Text Windows. A powerful built-in optimizing compiler produces fast
   code.) PCS/Geneva 4.02PL1 has been tested on XTs, ATs, AT386s and
   AT486s under various DOS and OS/2 versions. It even runs on
   Hewlett-Packard's HP95LX. It also runs on Suns with a DOS emulator.
   PCS/Geneva is available free by anonymous ftp from
      cui.unige.ch:/PUBLIC/pcs/ [129.194.70.1]
   as the files pcscheme.doc, pcscheme.exe, pcscheme.fil and pcscheme.taz
   or by email (uuencoded) from [e-mail]. If you ftp
   PCS/Geneva, please send mail to [e-mail]; the authors
   like to know their public and will inform you when a new release is
   available. This is also the email address for bug reports or if you
   need any kind of help. This product may be distributed freely and
   used without restrictions except for military purposes.
   (PCS/Geneva was developed by Larry Bartholdi <[e-mail]>
   and Marc Vuilleumier <[e-mail]>.)

   Pixie Scheme for the Macintosh is a nearly complete implementation of
   R3RS available by anonymous ftp from
   rascal.ics.utexas.edu:/misc/mac/programming/
     Pixie.Goodies.SIT.bin
     Pixie.NoFPP.world.SIT.bin
     Pixie.world.SIT.bin
     PixieScheme.NoFPP.SIT.bin  ; for macs without floating-point coprocessor
     PixieScheme.SIT.bin        ; for macs with FPP
     Pixie_Scheme_Help.SIT.bin
     Pixie_intro
   Written by Jay Reynolds Freeman <[e-mail]>, P. O. Box 60628,
   Palo Alto, CA, 94306-0628. A copy may also be obtained from
     /afs/umich.edu/group/itd/archive/mac/development/languages
   as the file pixiescheme.cpt.hqx if your site runs the Andrew File System,
   or by anonymous ftp from mac.archive.umich.edu.

   Scheme->C is an R4RS compliant Scheme system that is centered around
   a compiler that compiles Scheme to C.  Besides the base language,
   the system includes "expansion passing style" macros, a foreign function
   call capability, records, weak pointers, 3 X11 interfaces, call/cc, and a
   generational, conservative, copying garbage collector. The result is a
   system that is portable, efficient, and able to build applications that
   contain a mix of compiled and interpreted Scheme, and compiled code
   from C, C++ and other languages.  The current release of Scheme->C runs
   on the following systems: Digital Alpha AXP systems with OSF/1, MIPS
   based DECstations, VAXen with ULTRIX, MIPS based SGI systems, PC's
   running Microsoft Windows 3.1, Apple Macintosh's running system 7.1,
   HP 9000/300, HP 9000/700, Sony News, Harris Nighthawk and other m88k
   systems, linux, and Sun SPARC.  Earlier releases also run on Sun3,
   DNx500, DN1000, 386's running Unix, DNx500, and DN1000 systems.  The
   software is available for anonymous ftp from
      gatekeeper.dec.com:/pub/DEC/Scheme-to-C/ [16.1.0.2]
   There are three interfaces to X11, all written in Scheme, available
   from gatekeeper. The first is a complete set of stubs to Xlib included
   in the base system.  The second is an alternative to Xlib called SCIX,
   found in
      gatekeeper.dec.com:/pub/X11/contrib/
   The third, ezd, allows programs to easily
   produce interactive, structured graphics and is found in
      gatekeeper.dec.com:/pub/DEC/ezd/
   Those without ftp access can also obtain Scheme->C and ezd from the
   Prime Time Freeware CD, Vol. 1, No. 2.  Additional information is
   available from the author at Digital Equipment Corporation's Western
   Research Lab: Joel Bartlett, [e-mail].

   Scheme 48 is a Scheme implementation based on a virtual machine
   architecture. Scheme 48 is designed to be straightforward, flexible,
   reliable, and fast. It should be easily portable to 32-bit
   byte-addressed machines that have POSIX and ANSI C support.
   In addition to the usual Scheme built-in procedures and a development
   environment, library software includes support for hygienic macros (as
   described in the Revised^4 Scheme report), multitasking, records,
   exception handling, hash tables, arrays, weak pointers, and FORMAT.
   Scheme 48 implements and exploits an experimental module system
   loosely derived from Standard ML and Scheme Xerox.  The development
   environment supports interactive changes to modules and interfaces.
   A beta release of Scheme 48 is available by anonymous ftp from
      ftp.cs.indiana.edu:/pub/scheme-repository/imp/scheme48-0.36.tar.Z
      martigny.ai.mit.edu:/archive/s48/scheme48-0.36.tar.gz
      ftp.cs.cmu.edu:/user/ai/lang/scheme/impl/s48/scheme48.tar.gz
   For more information, contact Richard Kelsey and Jonathan Rees
   at <[e-mail]>.

   SCM, free by anonymous ftp from
      swiss-ftp.ai.mit.edu:/archive/scm/
      prep.ai.mit.edu:/pub/gnu/jacal/
      ftp.cs.indiana.edu:/pub/scheme-repository/new/
      ftp.maths.tcd.ie:/pub/bosullvn/jacal/
   Current version 4e1. Runs on Amiga, Atari-ST, MacOS, MS-DOS, OS/2,
   NOS/VE, VMS, Unix and similar systems. SCM conforms to the Revised^4
   Report on the Algorithmic Language Scheme and the IEEE P1178
   specification. Scm is written in C.  ASCII and EBCDIC are supported.
   Written by Aubrey Jaffer.
      To receive an IBM PC floppy disk with the source files and MSDOS
   and i386 executables send $99 to Aubrey Jaffer, 84 Pleasant Street,
   Wakefield MA 01880, <[e-mail]>.
      SLIB (Standard Scheme Library) is a portable Scheme library
   which is intended to provide compatability and utility functions for
   all standard Scheme implementations, including SCM, Chez, Elk,
   Gambit, MacScheme, MITScheme, scheme->C, Scheme48, T3.1, and VSCM, and is
   available as the file slib2a0.tar.gz. Written by Aubrey Jaffer.
      JACAL is a symbolic math system written in Scheme, and is
   available as the file jacal1a4.tar.gz.
      SCMCONFIG contains additional files for the SCM distribution to build
   SCM on Unix machines using GNU autoconf.
      SLIB-PSD is a portable debugger for Scheme (requires emacs editor).
      TURTLSCM is a turtle graphics package which works with SCM on MSDOS
   or X11 machines. Written by Mkinen Sami <[e-mail]> and Jarkko
   Leppanen <[e-mail]>, it is available as the file turtlegr.tar.Z.
   (Also available from modeemi.cs.tut.fi:/pub/scm/ as turtlegr.tar.gz,
   along with an already-compiled MSDOS binary of scm with turtlegraphics
   and slib in scm4c0_b.zip.)
      XSCM is an X Windows interface to Xlib and the Motif and
   OpenLook toolkits for the SCM interpreter. It requires scm4a10 or
   later. It should be available at any archive of alt.sources, or on
   swiss-ftp, prep and indiana as the file xscm1.05.tar.Z.
   Contact [e-mail] for more information.
      SMG-SCM is a package that adds VMS SMG screen management routines
   to SCM. It is available from swiss-ftp, prep and indiana as the file
   sgm-scm2a1.zip. (A VMS version of Unzip is available by anonymous
   FTP from ftp.spc.edu:[ANONYMOUS.MACRO32]UNZIP.EXE.) This file
   contains the source code, documentation, and example code. Send
   comments and bugs to T. Kurt Bond, <[e-mail]> (preferred)
   or <[e-mail]>.
      WB is a disk based, sorted associative array C library (database). These
   associative arrays consist of variable length (less that 256 bytes)
   keys and values.  WB comes with an interface to SCM. Basic
   operations are creation, destruction, opening and closing of
   diskfiles and arrays, insertion, deletion, retrieval, successor, and
   predecessor (with respect to dictionary order of keys).  Functional
   application of find-next, deletion, and modification over a range of
   consecutive key values is supported. Multiple associative arrays
   can be stored in one disk file. Simultaneous access to multiple
   disk files is supported.  A structure checker, garbage collector
   are included.  A repair program and ram-disk type file (for
   temporary structures) are in developement. The current WB
   implementation has a file size limit of 2^32 * block size (default
   2048) = 2^43 bytes (8796 Gbytes). WB does its own memory and disk
   management. WB is available on swiss-ftp, prep, and indiana as wb1a1.tar.z.

      A Windows version of Scheme called WinScm is forthcoming from
   Vincent Manis of Langara College of BC, Canada.

      Hobbit is a Scheme-to-C compiler that works with the SCM Scheme
   interpreter. It treats SCM as a C library and integrates compiled
   functions into SCM as new primitives. Hobbit release 2 works with SCM
   release 4b4. Future releases of SCM and Hobbit will be coordinated.
   Hobbit imposes strong restrictions on the higher-order features of
   Scheme. For example, it does not support continuations.  The main aim
   of hobbit is to produce maximally fast C programs which would retain
   most of the original Scheme program structure, making the output C
   program readable and modifiable. Hobbit is written in Scheme and is
   able to self-compile. Hobbit can be obtained via anonymous ftp from
      swiss-ftp.ai.mit.edu:/archive/scm/hobbit2.tar.Z
      prep.ai.mit.edu:/pub/gnu/jacal/hobbit2.tar.Z
      ftp.cs.indiana.edu:/pub/scheme-repository/new/hobbit2.tar.Z
   For further information, contact the author, Tanel Tammet, at
   <[e-mail]> or at Tanel Tammet, Department of Computer
   Sciences, Chalmers University of Technology, S-41296 Go"teborg, Sweden.

   Similix is a Self-Applicable Partial Evaluator for a Subset of Scheme.
   Written by Anders Bondorf, Olivier Danvy, and Jesper J{\o}rgensen. It
   is available by anonymous ftp from
      ftp.cs.indiana.edu:/pub/scheme-repository/imp/
   as similix.tar.Z or from ftp.diku.dk:/pub/diku/dists/Similix.tar.Z. For
   more information, contact Anders Bondorf, DIKU, Department of Computer
   Science, University of Copenhagen, Universitetsparken 1, DK-2100
   Copenhagen, Denmark, or send email to [e-mail]. Similix conforms
   to the IEEE and R4RS standards, but also runs under R3RS Scheme. It
   runs in SCM, Chez Scheme and T3.1.

   SIOD (Scheme in One Defun), free by anonymous ftp from
        ftp.cs.indiana.edu:/pub/scheme-repository/imp/siod-v3.0-shar
        ftp.std.com:/pub/gjc/siod-3.0-shar
   or in any comp.sources.unix archive.  Runs on VAX/VMS, VAX UNIX, Sun3,
   Sun4, Amiga, Macintosh, MIPS, Cray, Windows NT/WIN32.  Small scheme
   implementation in C arranged as a set of subroutines that can be
   called from any main program for the purpose of introducing an
   interpreted extension language.  Compiles to ~42K bytes of
   executable.  Lisp calls C and C calls Lisp transparently. Version
   3.0 includes support for manipulation of Oracle and Digital RDB
   relational databases (SQL interface).
   Written by George Carrette <[e-mail]> or <[e-mail]>.

   STk is a R4RS Scheme interpreter which can access the Tk graphical
   package. All of the commands defined by the Tk toolkit are available
   to the STk interpreter, and Tk variables are reflected back into
   Scheme as Scheme variables. Callback is expressed in Scheme. Includes
   a CLOS-like OO extension called STklos, which provides multiple
   inheritance, generic functions, multi methods, and a true meta-object
   protocol.  A set of classes have been defined to manipulate Tk
   commands (menu, buttons, scales, canvas, canvas items) as Scheme
   objects. STk runs on Sparc (SUNOS 4.1.x), Dec 5xxx (Ultrix 4.2), SGI
   (Irix 4.05, 5.1.1), DEC Alpha, and Linux 1.0. STk is available by
   anonymous ftp from
      kaolin.unice.fr:/pub/STk-2.1.tar.gz [193.48.229.225]
   Please send bug reports, comments, and questions to Erick Gallesio,
   <[e-mail]>, Universite de Nice - Sophia Antipolis, ESSI - I3S
   Route des colles, BP 145, 06903 Sophia Antipolis CEDEX, FRANCE,
   phone [phone], fax [phone].
   To subscribe to the mailing list, send a message with
      subscribe
   in the Subject field to [e-mail].

   T3.1 is a Scheme-like language developed at Yale. Available by
   anonymous ftp from
       ftp.ai.mit.edu:/pub/systems/t3.1/
   T may be obtained in Europe from
       nic.funet.fi:/pub/unix/languages/scheme/t3.1/
       ftp.diku.dk:/pub/t3.1/
   Runs on DecStations (MIPS processor) and SGI Iris, Sun4
   (SPARC), Sun3, Vax/Unix. Includes a copy of the online version of the
   T manual and release notes for T3.0 and T3.1. All implementations
   include a foreign function (C) interface. To be informed of fixes, new
   releases, etc., send your email address to [e-mail]. Bug
   reports should go to [e-mail]. A multiprocessing version of
   T (for Encore Multimax) is available from masala.lcs.mit.edu:/pub/mult.
   [The sources were last modified November 22, 1991.]

   UMB Scheme is a R4RS Scheme available by anonymous ftp from
   ftp.cs.umb.edu:/pub/scheme/umb-scheme-2.10.tar.Z and also in the Scheme
   Repository. It includes a simple editor, debugger, Written by William
   Campbell, University of Massachusetts at Boston, [e-mail].

   VSCM is a R4RS Scheme available by anonymous ftp from the Scheme Repository,
     ftp.cs.indiana.edu:/pub/scheme-repository/imp/vscmV0r2.tar.Z [130.63.9.66]
   Written by Matthias Blume, <[e-mail]>. The
   implementation is based on a virtual machine design with heavy support
   for most of the sophisticated features of Scheme. The virtual machine
   is written in ANSI-C to aid in its portability. The bytecode compiler
   is written in Scheme itself. Documentation of VSCM is also available as
      http://www.cs.princeton.edu/grad/Matthias_Blume/vscm.html

   XScheme is available free by anonymous ftp from
      ftp.uu.net:/MSDOS/languages/X-scheme
      ftp.uu.net:/amiga-sources/xscheme.20.zoo
   It includes an object system and is R3RS compliant.
   It was written by David Michael Betz, 167 Villa Avenue #11, Los Gatos,
   CA 95032, 408-354-9303 (H), 408-862-6325 (W), [e-mail].
   XScheme is discussed in the newsgroup comp.lang.lisp.x.  It may also
   be found in the Scheme Repository.

Free Scheme Implementations implemented in Lisp:

   Peter Norvig's book "Paradigms of AI Programming" has a chapters about
   Scheme interpreters and compilers, both written in Common Lisp. The
   software from the book is available by anonymous ftp from
   unix.sri.com:/pub/norvig and on disk in Macintosh or DOS format from
   the publisher, Morgan Kaufmann.  For more information, contact: Morgan
   Kaufmann, Dept. P1, 2929 Campus Drive, Suite 260, San Mateo CA 94403,
   or call Toll free tel: [phone]; FAX: [phone]

   PseudoScheme is available free by anonymous ftp from
      ftp.cs.cornell.edu:/pub/jar/pseudo-2-9.tar.gz
      swiss-ftp.ai.mit.edu:/archive/pseudo/pseudo-2-8.tar.Z
   It is Scheme implemented on top of Common Lisp, and runs in Lucid,
   Symbolics CL, VAX Lisp under VMS, and Explorer CL. It should be
   easy to port to other Lisps. It was written by Jonathan Rees
   ([e-mail], [e-mail]). Send mail to
   [e-mail] to be put on a mailing list
   for announcements. Conforms to R4RS except for lacking a correct
   implementation of call/cc. It works by running the Scheme code
   through a preprocessor, which generates Common Lisp code.

   Scheme84 is in the public domain, and available by mail from Indiana
   University. It runs on the VAX in Franz Lisp under either VMS or BSD Unix.
   To receive a copy, send a tape and return postage to: Scheme84
   Distribution, Nancy Garrett, c/o Dan Friedman, Department of Computer
   Science, Indiana University, Bloomington, Indiana. Call 1-812-335-9770
   or send mail to [e-mail] for more information. It will also
   run in Jeff Dalton's port of Franz Lisp to Net/Free/386BSD on 386-like
   machines.  (See the Lisp FAQ for information on Franz Lisp.)
   Scheme84 is available by anonymous FTP from
      ftp://ftp.cs.indiana.edu/pub/scheme-repository/imp/scheme84.tar.gz

   Scheme88 is available by anonymous ftp from rice.edu:/public/scheme88.sh
   and also from the Scheme Repository.

----------------------------------------------------------------
Subject: [2-2] Commercial Scheme implementations.

   Chez Scheme Version 5 is a high-performance implementation of Scheme
   conforming to the IEEE/ANSI Scheme Standard and the R4RS.  Chez Scheme
   provides an incremental optimizing compiler, complete run-time library,
   generation-based garbage collector, interactive inspector, and C
   interface.  New Version 5 features include improved performance,
   lexical macros, multiple values, shared incremental heaps, guardians
   and weak pairs, and generic ports.  Version 5 is available for Sparc
   SunOS and Solaris, Alpha OSF/1, SGI IRIX 5.X, Motorola mc88000 SVR3/4,
   80386 NeXT Mach, BSDI BSD/386, and Linux.  More information on Chez
   Scheme can be obtained via anomymous ftp from
      ftp.cs.indiana.edu:/pub/scheme/chezscheme/
   Site license fees start at $9000 ($4500 academic).  We are not able to
   handle personal sales at this time.  For detailed pricing and ordering
   information contact [e-mail] or Kent Dybvig at
   [e-mail].  Cadence Research Systems, 3814 Devonshire South,
   Bloomington, IN 47408-9698, USA.  Phone [phone], fax [phone].

   EdScheme runs on Macintosh, DOS and Atari ST and costs $50.  It
   includes an incremental compiler, editor, and turtle graphics
   interface, and is a close match to the IEEE standard. Implemented by
   Iain Ferguson, Edward Martin, and Burt Kaufman.  The book (The
   Schemer's Guide) is 328 pages long costs $30.  Write to: Schemers
   Inc., 2136 NE 68th Street, Suite 401, Fort Lauderdale, FL 33308, call
   [phone], or fax [phone]. You can also send email to
   [e-mail].  They also offer an Archimedes (Acorn)
   platform which is only available through their European distributor,
   Lambda Publications, who is reachable by phone at 44-793-695296 or by
   EMail on [e-mail].

   Ibuki PC Scheme 5.01 is a modern, up-to-date implementation of TI
   PC-Scheme (see [2-1]). Ibuki purchased the rights to TI PC Scheme
   on July 13, 1992. Ibuki PC Scheme runs under DOS on all IBM
   compatible PCs, including 486s, and can use up to 4mb of extended
   memory. It will also run under Windows 3.1. For more information,
   contact IBUKI, 340 Second Street, PO Box 1627, Los Altos, CA 94022,
   phone [phone], fax [phone], email Richar Weyhrauch
   <[e-mail]>. Ibuki has a special pricing program for schools
   teaching Scheme in courses.

   MacScheme is a Scheme interpreter and compiler for the Apple Macintosh, and
   includes an editor, debugger and object system.  MacScheme costs $125
   (includes compiler) and Scheme Express costs $70 (interpreter only). It
   requires 1mb RAM. A development environment (MacScheme+Toolsmith) costs
   $495. Conforms to the Revised^4 Report on the Algorithmic Language Scheme.
   MacScheme+Toolsmith includes support for menus, windows, and interfaces to
   the Macintosh Toolbox, and can create small standalone Macintosh
   executables. Implemented by Will Clinger, John Ulrich, Liz Heller and Eric
   Ost.  Write to: Lightship Software, PO Box 1636, Beaverton, OR 97075, or
   call [phone]. They're moving to California. The temporary phone
   number is 415-940-4008 (Liz Heller). The new phone number will be
   415-694-7799, or fax bug reports to 415-694-7705 or 800-441-5015.
   MacScheme is distributed by Academic Computing Specialists (ACS),
   2015 East 3300 South, Salt Lake City, UT 84109-2630, 1-800-531-3227
   or 1-800-552-1601 (801-484-3923), fax [phone]. These products
   may also be purchased from Academic Computing Specialists, PO Box
   711, Dewey, AZ 86327, tel [phone], fax [phone].

----------------------------------------------------------------
Subject: [2-3] What Scheme-related discussion groups and mailing lists exist?

Before posting to any discussion group, please read the rest
of this FAQ, to make sure your question isn't already answered.

See the Lisp FAQ for a list of Lisp-related discussion groups and
mailing lists. We list here only those newsgroups and mailing lists
directly associated with Scheme.

Newsgroups:

   comp.lang.scheme        General Scheme-related discussion.
                           This newsgroup is available in digest
                           fromat as part of the Scheme Digest
                           [e-mail].
   comp.lang.scheme.c      Discussion of C-Scheme, a scheme dialect
                           more commonly known as "MIT Scheme".
                           This newsgroup is gatewayed to the
                           [e-mail] mailing list.
   comp.lang.lisp.x        Discussion of XLISP, a dialect of Lisp, and XScheme.
   comp.lang.dylan         Discussion of Dylan (see [4-6]), Apple's
                           new Scheme-like programming language. Gatewayed to
                           [e-mail].

We list several mailing lists below. In general, to be added to
a mailing list, send mail to the "-request" version of the address.
This avoids flooding the mailing list with annoying and trivial
administrative requests. [To subscribe to info-mcl, info-dylan, or
other mailing lists based at cambridge.apple.com, send a message to
[e-mail] with "subscribe <list_name>" in the
message body. Likewise use "unsubscribe <list_name>" to cancel your
subscription and "help" to get help.]


General Scheme Mailing Lists:

   [e-mail]           Discussion of Scheme. Gatewayed to
                                   the comp.lang.scheme newsgroup.
   [e-mail]               General discussion about Scheme.


Particular Flavors of Scheme:

   [e-mail],
   [e-mail]  C-Scheme. Gatewayed to the
                                   comp.lang.scheme.c newsgroup.

   [e-mail]           T, a dialect of Scheme.

   [e-mail]    PseudoScheme

   [e-mail]  Dylan (not really scheme, but)

----------------------------------------------------------------
;;; *EOF*