What is a PMS?

With ECMLINK, this should be avoided and is here for historical value only.

A PMS is a Performance Management System, a piggyback engine management computer made for DSMs and other vehicles. As with the AFC and VPC, many DSMers use the PMS as a gateway to higher performance. The good news is that the PMS is more flexible than the VPC, allowing more precise tuning - the bad news is that the PMS is more flexible than the VPC, allowing the operator many more ways to screw up.