PVM (Parallel Virtual Machine) is a software package which permits a heterogeneous collection computers connected by a network to be used as a single large parallel computer.

The S-Lang PVM module provides a S-Lang interface to PVM. By organizing distributed computations with S-Lang, one gains the advantages of programming in an interpreted language.

With this approach, one can make efficient use of all available computer resources: high level logic is handled in interpreted code, CPU intensive work is done in compiled code and PVM simplifies using all available CPUs.