\hspace{0.5cm} \b{tabular}{|l@{\hspace{2.5cm}}r|} Ada &  [DoD82] \\ Concurrent C &  [Ts84] \\ Concurrent Prolog &  [Sh86] \\ CSP &  [Ho78] \\ Emerald &  [Bl87] \\ Linda &  [Ge86] \\ Occam &  [In84] \\ Parlog &  [CG86] \\ POOL &  [Am87] \\ \e{tabular}