AAIS Full Control Prolog (version 3.1.3) is an Edinburgh-standard compiler and interpreter that runs on all Apple 680x0 Macintosh computers (from Plus through Quadras and Powerbooks). It runs under System 6 and 7 (or A/UX 3.0), requiring 4mb RAM, and is 32-bit clean. It is built on an object-oriented kernel, includes many object-oriented extensions to the language, functions for constructing graphical user interfaces, direct program access to the printer for printing text or graphics, and full support for Apple Events. There are also numerous example programs, including source code for the AAIS Full Control Prolog's own standard development interface, and how to interface with Oracle databases and FileMaker Pro databses. AAIS Full Control Prolog costs $495. For an additional $199 (and a signed license), you can get a copy of AAIS Prolog Program Creator, an application generator/runtime distribution system that turns Prolog programs into Macintosh applications. For more information, write to Advanced AI Systems, Inc., PO Box 39-0360, Mountain View, CA 94039-0360, call 415-948-8658, fax 415-948-2486, or email AAISProlog@aol.com. Earlier version (2.0) reviewed in AI Expert, Feburary 1991. [NOTE: Douglas Lanam, President of Advanced AI Systems, Inc., announced on April 1, 1994, that he would be ceasing all future development of the product due to economic and personal reasons. The remaining stock of AAIS Full Control Prolog and the Program Creator is being offered on an as-is basis with no return for $99 a copy. You can order copies by phone using your credit card. Technical support through phone, mail, and email is continuing, but they cannot return phone calls or faxes outside North America, so those replies would be sent by email or snail mail.] AIAI Edinburgh Prolog is a high level prolog emulator that runs on Acorn R140 (RISC iX), DG AViiON (DG/VX 4.1), Vax (Berkeley Unix, VMS), Gould Encore (Unix), HP 9000/300 (HP-UX), MIPS RISC (RiscOS), Sequent (DYNIX V3), Sun 2,3,4 (SunOS-3,4). For more information, write to AIAI, AI Applications Institute, Software Secretary, University of Edinburgh, 80 South Bridge, Edinburgh EH1 1HN, UK, call +44 (31) 650 2734, fax +44 (31) 226 2730, or send email to AIAI@ed.ac.uk. ALS Prolog - Workstation is a common version running on nearly all Unix machines (Sun 4.1.3 & Solaris; HP 9000/7xx/8xx; IBM PowerPC AIX; SGI IRIX; NeXT; DG AViiON), on DOS and DesqView/X (PCs with 80386 - Pentium), and on Macintosh (PowerMac and M680x0). Common price: $800 US ($880 outside US), with a 40% academic discount. Provides a superset of Edinburgh Prolog. Includes OOP, C interface (including embedding Prolog in C programs), Window systems interfaces (X Windows/Motif; NextStep; MacToolbox). Student editions $59: Mac - with interface; DOS - TTY (all PCs with DOS from 8088-Pentium; MS Windows in a DOS window). Available from Applied Logic Systems, Inc., PO Box 180, Newton Centre, MA 02159, phone 617-965-9191, fax 617-965-1636. Email: info@als.com. Send a message to info@als.com with subject line "HELP" to get a general information file in reply. The URL for the WWW site is http://www.als.com/ and the anonymous FTP site is ftp.als.com. Amzi! Prolog + Logic Server 3.3 (formerly Cogent Prolog) is an Edinburgh- standard development system and Logic Server API for embedding Prolog modules in C/C++, Visual Basic, Delphi, Access and other Windows 3.x, 95, NT 3.5x, DOS and 32-bit DOS tools. Amzi! Prolog can also be extended with your own predicates in C/C++ and Delphi. Professional, Personal and Student Editions, $79-$598. No royalties. Also available is an interactive tutorial, the Active Prolog Tutor ($75) and a tutorial with source code prototypes for expert systems shells including: forward/backward chaining, frames, rete- network and more ($94). For more information send email to info@amzi.com, write to Amzi! Inc., 40 Samuel Prescott Drive, Stow, MA 01775, call 508-897-7332, or fax 508-897-2784. Additional information is also available from their anonymous FTP site ftp://ftp.amzi.com/pub/users/amzi/ or their Web page http://www.amzi.com Arity Prolog 6.1 is an emulator with interpreter and compiler and runs on DOS ($650), OS/2 ($1k), Windows (extra $350), OS/2 V.2, and Windows-NT. (Note that Windows support means that you can write Prolog programs that manipulate Windows. The Windows version of Arity Prolog does not itself run under MS Windows.) For more information, write to Arity Corporation, Damonmill Square, Concord, MA 01742, call 800-722-7489 (508-371-1243), fax 508-371-1487, or send email to 73677.2614@compuserve.com or Paul G. Weiss <pgweiss@netcom.com>. ProLog by BIM is a high-performance and robust implementation of the Prolog language. It compiles to native machine code for maximum execution speed, and provides flexible memory management with automated expansion, shrinking, garbage collection and user-definable parameters. The ProLog by BIM environment comprises a GUI including an execution monitor and debugger, an on-line help facility, a extended emacs interface and a profiler. ProLog by BIM also includes a bi-directional external language interface, which is used for the included interfaces to graphics, windowing and RDBMS packages. The system also comes with a large library of Prolog source code which contains many of the most commonly used predicates. Stand-alone run-times without royalties and embeddability allow problem-free end-user delivery. ProLog by BIM comes with Carmen, a WYSIWYG GUI-Generator delivering Prolog code that allows notifiers and call-backs in Prolog and serves as a powerful rapid-prototyping aid. ProLog by BIM runs on SPARC, INTEL PC running Solaris 2.x, HP700 and IBM RS/6000. BIM provides both training and consultancy on Prolog and Prolog based developments efforts. For more information write to BIM Engineering Europe sa/nv, ProLog by BIM dept., avenue A. Einstein 4, B - 1348 Louvain-la-Neuve, Belgium, call +32 10 47 06 11, fax to +32 10 47 08 11 or email to prolog@bim.be. CIM-Prolog is a high-level emulator with interpreter for Apollo Domain and Sun (Unix). Also Standard Prolog for Apollo Domain, IBM PC/AT (DOS), INMOS transputer, and Sun. A parallel version is also available. For more information, write to Creative Soft GmbH, Turnstrasse 10, D-8510 Fuerth, Germany, call +49 911 7499214, or fax +49 911 747756. Coder's Prolog 2.0 is a Prolog Interpreter from Austin Code Works. Works on any system with a C compiler (it is designed for use with C programs), including IBM PCs (MS-DOS) and Unix workstations. For more information, write to Austin Code Works, 11100 Leafwood Lane, Austin, TX 78750-3587, call 512-258-0785, fax 512-258-1342, or send email to info@acw.com. Delphia Prolog v2 is an Edinburgh-standard compiler and interpreter that runs on Sun3, Sun4, Sparc, RS/6000, Apollo, HP9000/300, Unigraph 68xxx, 386/486 (SCO Unix), DecStation (Ultrix), Sony NEWS (Unix), VAX (VMS, Ultrix), uVax (Ultrix), VaxStation (Ultrix). Includes database interfaces, graphical libraries, and incremental compilation. Price $10,000. Write to Delphia, 27 Avenue de la Republique, 38170 Seyssinet, France, call 33-76-26-68-94 or fax 33-76-26-52-27. An earlier version was reviewed in AI Expert, January 1991 and Feburary 1991. ECRC SEPIA. See ECLiPSe. SEPIA is no longer delivered as a stand-alone system, but as a part of ECLiPSe. EDCAAD C-Prolog is a prolog interpreter for Sun (SunOS), VAX (Ultrix, VMS), Apollo, and 68000 (Unix). An inexpensive academic license is available. It is an interpreter-based system, and hence is slower than WAM-based Prologs. It is implemented in C, and should run on almost any 32-bit machine with a C compiler. For more information, write to EdCAAD, Department of Architecture, Edinburgh University, 20 Chambers St., Edinburgh EH1 1JZ, UK, call +44 (31) 650 1000, fax +44 (31) 667 0141, or send email to chris@caad.ed.ac.uk. FRIL (Fuzzy Relational Inference Language) is a logic-programming language that incorporates a consistent method for handling uncertainty, based on Baldwin's theories of support logic, mass assignments, and evidential reasoning. Mass assignments give a consistent way of manipulating fuzzy and probabilistic uncertainties, enabling different forms of uncertainty to be integrated within a single framework. Fril has a list-based syntax, similar to the early micro-Prolog from LPA. Prolog is a special case of Fril, in which programs involve no uncertainty. Fril runs on Unix, Macintosh, MS-DOS, and Windows 3.1 platforms. For further information, write to Dr B.W. Pilsworth, Fril Systems Ltd, Bristol Business Centre, Maggs House, 78 Queens Rd, Bristol BS8 1QX, UK. A longer description is available as ftp.cs.cmu.edu:/user/ai/areas/fuzzy/com/fril.txt GT-Prolog is a high performance implementation of Edinburgh-standard Prolog for the Commodore Amiga. GT-Prolog includes the ProBench interactive development environment supporting incremental compilation, a multi-port debugger based on the Byrd model, a source code editor, and a break facility. GT-Prolog provides transparent access to sophisticated optimization techniques including Tail Recursion Optimisation, First Argument Indexing/Hashing, In-line Arithmetic Evaluation and automatic Garbage Collection of code and data. Error handling is based on catch and throw mechanisms. GT-Prolog is also one of the first implementations to support a fully logical Prolog database. GT-Prolog provides explicit control of memory allocation allowing programs to use up to 16mb for data and 4gb for code and requires a minimum configuration of 1Mb memory plus Workbench version 2 or later. GT-Prolog includes a library of more than 120 predicates that provide user programs with access to the facilities of AmigaDOS. The single user price is 89.95 pounds sterling inclusive of VAT and postage/packing. For more information, write to Graham Thwaites, Grange Technology Limited, Stream Road, Upton, Didcot, Oxon OX11 9JG, UK, tel/fax +44-1235-851818, or send email to gtpam@gtech.demon.co.uk or 100434.3011@compuserve.com. HyperProlog. See Delphia Prolog. IBM PROLOG for AIX/6000 (PFA) is a high performance implementation of the PROLOG language, combined with a powerful programming environment, especially designed for the IBM RISC System/6000 under AIX. PFA was developed by BIM as an adaptation of ProLog by BIM for the IBM RISC System/6000 under AIX. It was selected by IBM Europe as their official PROLOG implementation for the RISC System/6000. For more information contact: BIM Engineering Europe sa/nv, ProLog by BIM dept., avenue A. Einstein 4, B - 1348 Louvain-la-Neuve, Belgium, phone: +32 10 47 06 11 - fax: +32 10 47 08 11 - email: prolog@bim.be IF/Prolog 5.0 is a Prolog compiler with a variety of highly efficient constraint problem solving tools, including Boolean constraints, Rational terms, Linear terms, Equations and Inequations, Finite Domain Constraints and Co-routines. IF/Prolog conforms to the ISO Prolog Standard, part 1. IF/Prolog also includes interfaces to C, C++, FORTRAN, X11 (OSF/Motif and Athena widgetsets), and SQL (Ingres, Oracle, and Informix). IF/Prolog has full screen X11 and Windows based debuggers and online hypertext help and quick reference guide. It is available on Unix, OSF/1, VMS, MS-Windows, and mainframe systems, including Apollo, Aviion 300, Macintosh (A/UX), microVAX 2000 (Ultrix), Vax (Ultrix, VMS), VaxStation (Ultrix), DEC Alpha (OSF/1, VMS), HP9000, Sun3, Sun4, Sparc, UTS, AIX/370, IBM RS/6000, Decstation (Ultrix, OSF/1), Sequent S16, Silicon Graphics, Sony News (Unix), Motorola, Nixdorf, Interactive Unix, SCO UNIX, DOS-based 386 PCs, and Windows 3.0/3.1. Academic licenses are available at half price. For more information contact Annette Kolb (marketing) or Dr. Andrew Verden (technical) at IF Computer GmbH, Ludwig-Thoma-Weg 11a, D-82065 Baierbrunn, tel +49 89 7936 0037, fax +49 89 7936 0039, or email prolog@mch.sni.de, or IF Computer Japan Ltd., 7/F 2nd Asanuma Bldg., 3-21-10 Hongo, Bunkyo-ku, Tokyo 113, Japan. tel + 81 3 3818 5826 fax + 81 3 3818 5829. They have a web page at the URL http://www.biz.isar.de/ifcomputer/ IQSOFT MProlog is a high-level emulator with interpreter for Unix, Macintosh and IBM PC (DOS). Runs on Vax (Unix 4.2 BSD), 68000-based machines (Unix), Tektronix 4404, HP3000, and Siemens 1. For more information, write to IQSOFT, SZKI Intelligent Software Ltd., Iskola u. 10., Budapest, H-1011, Hungary, call +36 1 201 6764, fax +36 1 201 7125, or send email to szeredi@iqsoft.hu. LPA Prolog is a 32-bit prolog compiler for IBM PCs (Windows 3.11/3.1 and Windows95, NT) and Apple Macintosh with direct access to graphics, menus, windows etc and incremental compilation and Edinburgh syntax compatability. LPA Prolog++ is an object-oriented programming system based on Prolog. (See Chris Moss's book on Prolog++ in [1-3].) flex is an expert system shell with access to the Prolog compiler system. MacProlog32 runs under System 7. Programmer Edition is $495 list, and the Developer Edition, which includes a runtime generator for producing standalone applications, is $995. LPA Prolog for Windows runs $495 and supports DDE and DLLs, and a variety of interfaces. Prolog++ runs $795 ($1,495 Developer Edition). LPA also offer the ProData Database Interface toolkit which uses ODBC technology to join Prolog clauses to RDMS tables. Contact vendor regarding educational discounts, site licences, and details of low-cost Personal Edition and new fuzzy logic and data mining products. Write to Logic Programming Associates, Ltd., Studio 4, Royal Victoria Patriotic Building, Trinity Road, London SW18 3SX, England, call +44 (0)181-871-2016, fax +44 (0)181-874-0449, In the US call 800-949-7567. or send email to lpa@cix.compulink.co.uk (sales, tech support), or 100135.134@compuserve.com The URL for their web page is: http://www.lpa.co.uk/ Maxon Prolog is available for the Atari ST from the German magazine 'ST-Computer' for 298 DM. Tel: 010 49 61 96 481811. MU-Prolog, NU-Prolog are prolog interpreters from the University of Melbourne. Source licences are available for educational institutions. Implemented in C for BSD Unix. Currently running on Sun3, Sun4, Vax, Elxsi, Encore, and SGI. For more information, write to University of Melbourne, MU-Prolog Distribution, Department of Computer Science, Parkville, Victoria 3052, Australia, call +61 3 344 7270, or send email to lee@cs.mu.oz.au or jws@cs.mu.oz.au. ORISA of Germany offers three Prolog implementations for OS/2: ORISApro, ORISAentry, and ORISAbase. + ORISApro: Interpreter, incremental compiler, debugger. Both command line and PM front end. Supports Edinburgh syntax and Edinburgh predicates. Wide range of built-in predicates. Interfacing to procedural languages. API for PM applications, SOM, and SQL. Non-standard data types include arrays, key-value lists (items), large rational numbers, skeletons with nonatomic names, strings, and user-defined types. Based on IBM's cancelled Prolog/2. Costs 1000 DM (about $700). [SOM support is not yet implemented, but should be available in a future version of ORISApro.] + ORISAentry: A light weight version of ORISApro, missing some of its advanced features, like SOM support and procedural language interface. Costs about 100 DM (about $70). Available since 1st quarter of 1995. + ORISAbase: Object-oriented Prolog development environment for Prolog based OS/2 GUI applications. Should be available in 3rd quarter 1995, with beta testing scheduled for October 1995. ORISAbase prices are planned to range from about 5,000 DM ($3,500) to about 100,000 DM ($70,000). The actual price depends on the number of ordered developer and runtime licenses and the number and type of service contracts. For informations and orders write to ORISA Software GmbH, Leutragraben 8a, D-07743 Jena, Germany Fax: +49 3641 588022, or ORISA Software GmbH, Sommerrain 8, D-70839 Gerlingen, Germany Tel/Fax: +49 7156 48808 OU Prolog is a prolog interpreter from Open University for IBM PC (MS-DOS). Includes video, books. Ask for item PD622 and quote reference SA69. For more information, write to Open University, Learning Materials Sales Office, PO Box 188, Milton Keynes MK7 6DH, UK. PDC Prolog runs on IBM PCs (DOS, OS/2, Windows and SCO Unix). Formerly known as Turbo Prolog from Borland. Includes a native code compiler but is incompatible with most other prologs. Its variables are strongly typed, unlike most other prologs. For more information, write Prolog Development Center, 568 14th Street, Atlanta, GA 30318, call 800-762-2710, (404-873-1366), fax 404-872-5243 or email pdc-request@pdc.dk (general information), sales@pdc.dk (sales), support@pdc.dk (tech support). European customers may write to Prolog Development Center, A/S, H.J. Holst Vej 5A, DK-2605 Broendby, Denmark, call +45 36 72 10 22, or fax +45 36 72 02 69. Reviewed in AI Expert January 1991. Other email addresses include 753CD.165@compuserve.com. To subscribe to the PDC-L@nic.surfnet.nl mailing list, a discussion list for PDC Prolog users, send mail to LISTSERV@nic.surfnet.nl with SUBSCRIBE PDC-L <your full name> in the message body. POPLOG is a high-level prolog emulator with interpreter for Unix. The POPLOG environment integrates four AI programming languages in one environment: Lisp, Prolog, ML and POP11. POPLOG can also load in C and Fortran binaries. Runs on VAX (Ultrix, VMS), VAXStation (Ultrix), DECStation (Ultrix), Sun 3,4, Sparc, Solbourne, HP Apollo 9000/400, Sparc (HP-UX), MIPS (RISCOS), Sequent Symmetry (Dynix), Apple Macintosh (AUX), SONY News (News-OS), and Silicon Graphics Iris (Irix). The academic version from Sussex University. For more information, write to POPLOG, Sussex University, Poplog Manager, School of Cognitive Sciences, Falmer, Brighton BN1 9QN, UK, call +44 273 608367, fax +44 273 678188, or send email to popsales@cogs.sussex.ac.uk or popmanager@cogs.sussex.ac.uk. The commercial version is available from Integral Solutions Ltd as Integral Poplog and Pop++. For more information, write to Integral Solutions Ltd, Unit 3, 23 Campbell Court, Bramley, Basingstoke Hampshire RG26 5EG, UK, call +44 256 88 20 28, fax +44 256 88 21 82, or send email to isl@integ.uucp or isl@integ.co.uk. The North American retailer is Computable Functions Inc. For more informatin, write to Computable Functions Inc., 35 S. Orchard Drive, Amherst, MA 01002, call 413-253-7637, or fax 413-545-1249. Contact Robin Popplestone, pop@cs.umass.edu, for info on a new book on Pop-11. There's a users mailing list, and a newsgroup as well (comp.lang.pop). Prolog-2 (Commercial Version), is a high-level emulator with interpreter and compiler for IBM PC (MS-DOS, Windows 3.0/3.1), and 386-up. (Non-PC versions for Sun3, Sun4, HP9000 (Unix), RS/6000 (Unix), and VAX (VMS) are no longer supported, since ESI, the new owners, are also distributors for BIM-Prolog.) It is an Edinburgh standard prolog with a number of extensions. The windows version includes BIPs for programming windows graphics and dialogues. For more information, write to Expert Systems International (ESI), Attn: Leo Mulders, PO Box 148, NL-3700 AC ZEIST, the Netherlands, call +31-3404-22911, fax +31-3404-32888, or email <prolog@esi.nl>. Prolog III integrates constraint programming with Prolog. It runs on Apple Macintosh, IBM PC (386, MS-DOS), Next, Sun3, Sun4, Sparc, HP9000, Apollo, RS/6000, Bull DPX, Masscomp (Unix), Vax (Ultrix, VMS), DecStation and MicroVAX. For more information, write to PrologIA, Parc Technologique de Luminy, Case 919, 13288 Marseilles cedex 09, France, call 33-91-26-86-36, fax 33-91-41-96-37, or send email to prolia@dcftlx.das.net or prolia@tlxf.geomail.org. The US point of contact for Prolog III by PrologIA is BIM Systems, Inc. Prolog-86 is available from Solution Systems Inc. For more information, write to Solution Systems Inc., 335-D Washington Street, Norwell, MA 02061, call 617-337-6963, or fax 617-431-8419. PTC (Prolog To C) is a portable Prolog compiler based around an optimized Prolog to ANSI C compiler. It runs on Sun, SGI, IBM (Unix), and HP. PTC includes an integrated compiler/interpreter, project-file-based compilation, a Motif user interface, editor, debugger, online help, and support for C modules. It costs $1,495 for the development environment and $795 for each additional runtime library. The standalone environment is $495. For more information, write to Paralogic Inc., 115 Research Drive, Bethlehem, PA 18015, call 215-861-6960, fax 215-861-8247 or send email to plogic@lehi3b15.csee.Lehigh.edu. Quintec Prolog is a high-level emulator with interpreter for IBM PC (MS-DOS), and Unix workstations such as Vax, VAXstation (Ultrix, VMS), Decstation (Ultrix), and Sparc (SunOS4.0). For more information, write to Quintec Prolog, Quintec Systems Ltd., Midland House, West Way, Botley, Oxford OS2 0PL, UK, call +44 865 791565, or fax +44 865 791595. Quintus Prolog is a complete Prolog development system with extensive Prolog libraries, graphical user interface, source-linked debugger, profiler, on-line help, interface to X Windows, and user-customizable I/O and memory management. Quintus Prolog supports development of stand-alone applications, as well as fully embeddable Prolog modules, which may be called as subroutines from other languages. There are no royalties on applications developed with Quintus Prolog. Quintus offers Prolog-based solutions for database, expert system, and GUI developers. Quintus also provides Prolog consulting and Prolog training. Platforms include DEC Alpha (OSF/1), HP 9000 (HP-UX), IBM RS/6000 (AIX), PC (DOS, Windows, Windows NT, Solaris, OS/2), Macintosh 32bit, SGI (IRIX), Sun SPARC (SunOS, Solaris). For product information and Prolog training schedules contact Quintus Corporation, 301 East Evelyn Avenue, Mountain View, CA 94041, call 415-254-2800 or 800-542-1283 (US), fax 415-428-0211, or send email to sales@quintus.com. To be added to the users group mailing list, email to quintus-users-request@quintus.com. The email address for technical support is teksup@quintus.com. SICStus Prolog: SICStus Prolog 3 is an Edinburgh compatible Prolog that runs on most UNIX 32 and 64 bit platforms, Windows (NT and 95), MSDOS, and Macintosh platforms. It includes a WAM-based emulator and compiler, native code compilation for Sparc, MIPS and 680x0, indexed interpreted and compiled predicates mixed arbitrarily, modules, term and goal expansion hooks, support for cyclic terms, garbage collection and stack shifting, backtrackable side-effects and mutable terms, attributed variables and coroutining facilities, exceptions, unbounded precision integer arithmetic, double precision floating point arithmetic, extended set of built-in arithmetic functions, constraint solvers for Booleans, reals, rationals and finite domains (unbundled), support for building stand-alone applications, bidirectional C/Prolog interface, user-defined streams and signals, a GNU Emacs interface, execution profiling, and a "procedure box" debugger. An OR-parallel version of the development system, MUSE, can be built on several multiprocessor platforms. SICStus Prolog comes with a library of utility modules implementing commonly needed algorithms and data types, an external store for Prolog facts with user-defined indexing, an object-oriented extension (Prolog Objects), a package for GUI construction based in Tcl/Tk, access to operating system services, and more. Information about licensing, available third party software, and useful links is available on the WWW, URL http://www.sics.se/sicstus.html or by writing to SICS, Swedish Institute of Computer Science, PO Box 1263, S-164 28 KISTA, Sweden, calling +46 8 752 15 02, fax +46 8 751 72 30, or sending email to sicstus-request@sics.se or sicstus@sics.se. Bug reports and tech support questions should be sent to sicstus-bug@sics.se. To subscribe to the users group and implementors mailing list, send email to sicstus-users-request@sics.se. Mixtus is an automatic partial evaluator for SICStus Prolog. Presently it is distributed separately. Contact dan@sics.se for more information. SNI Prolog Version 3 is an implementation of the Prolog language that is compatible with the ISO Standard draft. It is available from Siemens Nixdorf for Unix workstations for about DM 11100 in Germany. SNI Prolog runs on the SGI, SNI and Sun platforms, and ports to other systems, including MS-DOS, are in progress. Includes coroutines, finite domains, numerical and boolean constraints, garbage collection, incremental compilation, dynamic linking, hypertext style on-line help, a window environment with an integrated editor, interfaces to INFORMIX, Motif/XWindows and C. The constraint programming features of SNI Prolog provide support for solving problems from operations research such as dynamic resource allocation and flexible scheduling with numerical constraints or the verification of complex systems with Boolean constraints. For more information, write to Siemens Nixdorf Informationssysteme AG, Otto-Hahn-Ring 6, D-8000 Munich 83, Germany, Attn: Hans-Juergen Stenger, Systems Planning, call +49 89 636 44049, fax +49 89 636 41208, or send email to stenger@sd235-hera.zfe.siemens.de. SPIES YAP is a high-level emulator with interpreter for the Apple Macintosh, Amiga (Atari ST), and Unix workstations including Sun3, Sun4, VAXstation, SGI, and HP9000. For more information, write to SPIES, Sociedade Portuguesa de, Importacao e Exportacao de Software, Lda Av da Republica, 46 - 2, 1000 Lisboa, Portugal, call +351 1 795075, or fax +351 1 775891. Turbo Prolog. See PDC Prolog. Visual Prolog. Developed as the multi-target GUI based successor to PDC Prolog (described above). The Standard version generates source code compatible 16-bit GUI executables for Win3.1x, Win95, WinNT and OS/2 PM (Prof.version only). The Professional version can be used to generate both 16 and 32-bit applications. The O/S independent VPI (Visual Programming Interface) combined with a host of automatic code generation and maintenance tools and full on-line help ease the construction of complicated applications. The Visual Prolog Web Pages at the URL htpp://www.pdc.dk/vip/ contain product information and news as well as free Visual Prolog tools and updates. Prolog Development Center developed the well known (but now extinct) Turbo Prolog from Borland. For more information US customers should call 1-800-762-2710 or 1-404-873-1366, fax 1-404-872-5243, write to Prolog Development Center, 568 14th Street, Atlanta, GA 30318, or send email to 75300.165@compuserve.com. Customers in other countries should call +45 36 72 10 22, fax +45 36 72 02 69, write to Prolog Development Center A/S, H.J. Holst Vej 3A - 5A, DK-2605 Broendby, Denmark, or send email to sales@pdc.dk or support@pdc.dk. A BBS is run at 404-872-5358. An early version of PDC Prolog was reviewed in AI Expert, January 1991. PDC has a forum on CompuServe (GO PCVENB). To subscribe to the PDC-L@nic.surfnet.nl mailing list, a discussion list for PDC Prolog and Visual Prolog users, send mail to LISTSERV@nic.surfnet.nl with SUBSCRIBE PDC-L <your full name> in the message body. XPRO 5.0 is a Prolog development environment for OS/2. It includes a 32-bit Prolog interpreter/compiler and a rule compiler than compiles natural language-style rules into Prolog code. Includes a C/C++ interface. Costs $299 (no runtime or license fees). For more information, contact: Rational Vision, 7111 West Indian School Road, Suite 131, Phoenix, AZ 85033, or phone 602-846-0371. See also CHIP V4 from COSYTEC in [2-6].Go Back Up