In this chapter we have given a variety of example programs written in Fortran and C. These examples demonstrate various ways of writing PVM programs. Some break the code into two separate programs, while others use a single program with conditionals to handle spawning and computing phases. These examples show different styles of communication, both among worker tasks and between worker and master tasks. In some cases messages are used for synchronization; in others the master processes simply kill of the workers when they are no longer needed. We hope that these examples can be used as a basis for better understanding how to write PVM programs and for appreciating the design tradeoffs involved.