OK, I finally clued in and got the current newos libc.(duh!) Man!, after coding apps all day, the brain just doesn't want to work....... There doesn't seem to be much done other than string functions which is much the same as where I left off. For a full overview of what I am following as a guide to the full posix spec please see: http://www-sld.slac.stanford.edu/HELP/POSIX/ The relevant listings of posix are under the headings: -Data_Structures -Callable_Functions -Shell_Commands So, as we can see there is a LOOOOONNNNGGGGG way to go before the full implementation of posix is met. Well, busy busy....... Where do I find the documentation for the thread calls like: arch_thread_initialize_kthread_stack etc.? Peter