/sys$common/syshlp/helplib.hlb Sys Files, [SYSLIB], CMA_TIS.H  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Header file for CMA$TIS_SHR.EXE, with the definitions required
    to use the old CMA Thread Independent Services. This
    functionality has been replaced by POSIX Threads and is
    considered obsolete. While it is still supported, it is not
    recommended for new code.