  AdCommunications - advanced communication toolbox for parallel programming
  Example - just to test the environment
  pvm - communications with other applications using Parallel Virutal Machine
  pvm_addhosts - add hosts to the virtual machine.
  pvm_barrier - blocks the calling process until all processes in a group have called it.
  pvm_bcast - broacasts a message to all members of a group
  pvm_bufinfo - Returns information about a message buffer.
  pvm_config - sends a message
  pvm_delhosts - deletes hosts from the virtual machine.
  pvm_error - Prints message describing an error returned by a PVM call
  pvm_exit - tells the local pvmd that this process is leaving PVM.
  pvm_f772sci - Convert a F77 complex into a complex scalar
  pvm_get_timer - Gets the system's notion of the current time.
  pvm_getinst - returns the instance number in a group of a PVM process.
  pvm_gettid - returns the tid of the process identified by a group name and instance number
  pvm_gsize - returns the number of members presently in the named group.
  pvm_halt - stops the PVM daemon
  pvm_joingroup - enrolls the calling process in a named group.
  pvm_kill - Terminates a specified PVM process.
  pvm_lvgroup - Unenrolls the calling process from a named group.
  pvm_mytid - returns the tid of the calling process.
  pvm_parent - tid of the process that spawned the calling process.
  pvm_probe - Check if message has arrived.
  pvm_recv - receive a message.
  pvm_reduce - Performs a reduce operation over members of the specified group
  pvm_sci2f77 - Convert complex scalar into F77
  pvm_send - immediately sends (or multicast) data.
  pvm_set_timer - Sets the system's notion of the current time.
  pvm_spawn - Starts new Scilab processes.
  pvm_spawn_independent - Starts new PVM processes.
  pvm_start - Start the PVM daemon
  pvm_tasks - information about the tasks running on the virtual machine.
  pvm_tidtohost - returns the host of the specified PVM process.
  pvmd3 - PVM daemon