1. An extension of C with rendezvous -based concurrency . Versions for most Unix systems are available commercially from AT&T .
["Concurrent C", N.H. Gehani et al, Soft Prac & Exp 16(9):821-844 (1986)].
["The Concurrent C Programming Language", N. Gehani et al, Silicon Press 1989].
(1994-11-11)
2. An extension of C with asynchronous message passing .
["Concurrent C: A Language for Distributed Systems", Y. Tsujino et al, Soft Prac & Exp 14(11):1061-1078 (Nov 1984)].
(1994-11-11)