goldfain@osiris.cso.uiuc.edu (03/31/89)
We have version 5.1 ... we haven't built up enough experience with it to comment on its bugginess or reliability as another poster has done, but at this early stage I can give three pluses : 1) Good support - They seem to be there on the phone, quite knowledgeable and helpful - it took one call and about 30 seconds for the support person to diagnose and solve my installation peculiarity ... we ended up installing it on a different PC than we had originally expected. It looks as though it will run on about any MS-DOS machine in the spectrum. 2) Good features - perhaps some of them don't work as advertised, once we get around to pushing the system, but if they all do, this is one great set of extensions to the Prolog environment. It interfaces very openly with Fortran, C, databases, and has internal options for C and database applications as well. 3) Good policies - they give educational discounts and don't copy-protect the disks, which made conversion to our 3.5" floppy machine much easier than with some other programs like DBASE. One concern with all PC prologs is that once you get to a hefty task, will there be unbearable speed or size limitations? We don't know yet ...