Janus

1. Distributed language with an ask/tell constraint system.

qdjanus is a Janus-to-Prolog compiler for Sicstus Prolog and jc is compiles to C.

["Janus: A Step Towards Distributed Constraint Programming", V. Saraswat <saraswat@parc.xerox.com> et al in Logic Programming: Proc 1990 North Am Conf, S. Debray et al eds, MIT Press 1990].

["Programming in Janus", Saraswat, Kahn, and Levy].

2. W.M. Waite, U Colorado. Intermediate language, claimed as an implementation of UNCOL. Used on CDC 6600.

["Experience with the Universal Intermediate Language Janus", B.K. Haddon et al, Soft Prac & Exp 8(5):601- 616 (Sep 1978)].