Programme Delivery Control, a standard to control video recorders using hidden codes in the teletext service
In linguistics:
PDC (language), a West Central German variety spoken by 150,000 to 250,000 people in North America
The reconstructed Dené-Caucasian proto-language, the tentative sister of the Nostratic proto-language, and common ancestor of the Basque, North Caucasian, Burushaski, Sino-Tibetan, Yeniseian and Na-Dené languages
Plugin Delay Compensation, a technique for keeping the output of digital audio effects synchronized when each may introduce delay into the signal
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