Rick, > 'knock one up' for Posix threads? I think it would be quite straightforward ... now (ALT bug hopefully now exterminated) we have done it for Java. But it would be *so* dull to hack it out :-( ... and you would still be at the mercy of the posix threads overheads ... On the other hand, if that brought the occam/CSP way of doing things to another large user community, it may be worth doing. But would `occam' get any credit in all this ... credit that would allow us to generate renewed funding to get on with what we believe ought to be done? Probably not :-(. If the answer could be "Probably", then I would feel motivated myself ... But much more exciting than posix -- although not, of course, standard -- is what Jim Moores will be presenting at WoTUG-22. This is a C library (for standard GNU C under currently just Linux) that gives you the occam/CSP model with occam-like overheads. This uses the old INMOS C API but could be relatively quickly moved to a C++ version that mirrored the JCSP (say) API ... But it's not posix I'm afraid! Cheers, Peter.