🚀 go-pugleaf

Well, here's what I found out about free prolog.  Thanks for your
responses.

**************

There is one called PDProlog which is a freeware Prolog which runs on
PC's.  It is more a less a very good demo program--it has almost full
PROLOG functionality, but it lacks tracing--a major drawback.  However,
I think the company that makes PDProlog sells a complete version of
their product (an "educational version") for about $30.

You can ftp PDProlog from wsmr-simtel20.army.mil.

From raper@xanth.cs.odu.edu Thu Oct 18 19:10:17 1990
********
Our company markets Prolog for Logic Programming Associates in London, 
England.  To encourage people to use Prolog, we have recently developed a
"Student Edition" program.  This allows students to purchase their own
PC or Mac license of a commercially successful Prolog for the price of
a textbook ($45).  And they will also be able to take advantage of Quintus's
services, and the microcomputer addd-on products like Prolog++, Flex, etc.

If you would like some of our product literature, and more information on
the "Student Edition" program, please e-mail me, or call me at 1(800) 542-
1283.  Thanks for your inquiry.  I encourage you to summarize the results
of your findings in the net.  I am sure that people would be interested to
know what shareware products are available for microcomputers.

Kenneth Crawbuck
Sales Systems Engineer
quintus!kenc@sun.com
*******
Anyway, there is a Prolog called PDPROLOG that runs on IBM PCs.  The low-end
version is public-domain; higher-level versions have increasinly higher costs.
The low end version seems adequate for instructional use.  Last I checked, it
was available via anonymous FTP from wuarchive.wustl.edu from the directory
/mirrors/msdos/prolog.

*****
    I have enclosed some information from Ken Johnson given in a previous
    posting to this newsgroup.
------------------------------------------------------------------------
>From: ken@aiai.ed.ac.uk (Ken Johnson)
Newsgroups: comp.lang.prolog
Subject: Re: PROLOG interpreter source wanted
Message-ID: <3175@skye.ed.ac.uk>

In article <669@lucretia.esa.oz> peter@attila.esa.oz (Peter Davison)
writes:

>  Has anybody out there got a PROLOG interpreter source written in C or
>know where I could possibly get my hands on one? 

Not in C, but in Pascal: Buy ``Prolog for programmers'' by Feliks
Kluzniak and Stanislaw Szpakiwicz.  Academic Press, 1985. 

It contains an IBM-PC diskette with the sources of a simple Prolog
system. 


-- 
Ken Johnson, AI Applications Institute, 80 South Bridge, Edinburgh EH1 1HN
E-mail ken@aiai.ed.ac.uk, phone 031-225 4464 extension 212
`I have read your article, Mr Johnson, and I am no wiser now than when I
started'.  -- `Possibly not, sir, but far better informed.'
-----------------------------------------------------------------------
-- 
Mott Given @ Defense Logistics Agency Systems Automation Center,
             DSAC-TMP, Bldg. 27-1, P.O. Box 1605, Columbus, OH 43216-5002
INTERNET:  mgiven@dsac.dla.mil   UUCP: ...{osu-cis}!dsac!mgiven
Phone:  614-238-9431  AUTOVON: 850-9431   FAX: 614-238-9928 I speak for myself
*******

I found a public domain interpreter for PC's that conforms to the Clocksin
& Mellish standard, on a bulletin board.  Look for "PDPROLOG".  If you have
trouble finding it, send me a disk and I'll give you a copy.

Regards,
Euan Mason
27 Newnham Tce
Christchurch 4
New Zealand

**********
i have got a public domain version of ADAProlog (i think that was the name -
i cannot look it up here at my office), it is called PDProlog.
full c&m standard. it does it's work, but is rather difficult to handle.
e.g. you can assert new rules *only* by use of assert.
if you want it, please send email. do *not* use the address in the header, but
those in the signature. 

tnx.   bernd
Bernd Meyer, LG Praktische Informatik IV, FernUniversitaet Hagen, D-5800 Hagen
Bahnhofstrasse 46/48, FRG, Phone: +49 2331 181677,    ** db6ag@db0sgl **
meyer@fernuni-hagen.de     or    meyer@dhafeu61.bitnet 
s=meyer; ou=vax1; ou=informatik; p=fernuni-hagen; a=dbp; c=de 
This posting is a symbol of my individuality and my belief in personal freedom.

Jack Vinson				vinson@linc.cis.upenn.edu