"PDP" may stand for prescription drug program, which is a segment of Medicare that subscribers are required to enroll in. "PDP" has also been an acronym used by many worldwide political parties, usually People's Democratic Parties, Popular Democratic Parties or Progressive Democratic Parties.
In data science and computing, the acronym "PDP" denotes a machine developed by the Digital technology company called a programmable data processor. The first programmable data processor was developed in 1960 as a minicomputer, and it is considered a direct predecessor of the modern personal computer. This minicomputer was one of the first processing machines to make use of parallel processing to increase overall computation rates.