Here is a list of commonly used PVM subroutines in C. (See man pages
for corresponding ones in FORTRAN)
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pvm_spawn: starts a new PVM process

pvm_initsend: clear default send buffer and specify message encoding

pvm_pkint, pvm_pkfloat, etc...: pack the active message buffer with
	arrays of prescribed data type

pvm_send: immediately sends the data in the active message buffer

pvm_recv: receive a message

pvm_upkint, pvm_upkfloat, etc,...: unpack the active message buffer
	into arrays of the prescribed data type

pvm_bufinfo: returns information about the message buffer

pvm_mytid: returns the task id of the calling process

pvm_parent: returns the task id of the the process that spawned the
	calling process

pvm_pstat: returns the status of the specified PVM process

pvm_perror: prints message of the last error returned by a PVM call

pvm_exit: tells the local pvmd that this process is leaving PVM