P4 A {macro}/subroutine package for parallel programming by Rusty Lusk <[email protected]>. P4 uses {monitors} on shared memory machines and message passing on distributed memory machines. It is implemented as a subroutine library for {C} and {Fortran}. An enhancement of the "Argonne macros", {PARMACS}. (ftp://info.mcs.anl.gov/pub/p4t1.2.tar.Z). E-mail: <[email protected]>.