PCM

Prepositional phrase

 * : used in lease arrangements, stating that costs are to be paid on a fixed date every month.

Noun

 * 1)  the system of encoding sound on a telephone for use in the PSTN, using a compander
 * 2)  a type of non-volatile computer memory
 * 3)  the type of material that phase change memory is composed of, capable of applications in switching