Imperial College Prolog. A
Prolog with
multi-threading,
TCP primitives for
interprocess communication, mailboxes, and an interface to
Parlog.
ftp://doc.ic.ac.uk/computing/programming/languages.
["IC Prolog II: A Language for Implementing Multi-Agent
Systems", Y. Cosmadopoulos et al, in Tutorial and Workshop on
Cooperating Knowledge Based Systems, Keele U 1992].