Definition from Wiktionary, the free dictionary
- pulse code modulation, the system of encoding sound on a telephone for use in the PSTN, using a compander
- phase change memory, a type of non-volatile computer memory
- phase-change material, the type of material that phase change memory is composed of, capable of applications in switching
- Per Calendar Month, acronym used in lease arrangements, stating that costs are to be paid on a fixed date every month.