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Definition of PCM
1. Initialism. pulse code modulation, the system of encoding sound on a telephone for use in the PSTN, using a compander ¹
2. Initialism. Phase Change Memory, a type of non-volatile computer memory ¹
3. Initialism. Per Calendar Month, acronym used in lease arrangements, stating that costs are to be paid on a fixed date every month. ¹
¹ Source: wiktionary.com