Brief Release History
Version 7.4 can generate 64 bit windows code (see also New Features in Visual Prolog 7.4).
Version 7.3 introduced generic classes and interfaces (see Generic programming), guarded monitors (see also New Features in Visual Prolog 7.3).
Version 7.2 introduced anonymous predicates (a logical pendant to anonymous functions) and namespaces (see also New Features in Visual Prolog 7.2).
Version 7.0 introduced parametric polymorphism.
Since version 6.0 the language has been fully object-oriented.
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