Police department

Pass Deflection, in American football, when a pass is batted down or blocked by a defensive player.

Partia Demokratike, Albania

Parkinson's disease, a degenerative neurological condition

Problem Determination (usually in Computing)

Prisoner's Dilemma

Public domain

Perfect Dark, a video game

Personality Disorder(s)

Pushing Daisies, a television show (premiered 2007) on ABC

Progressive Disease, Oncology-related term

The Principia Discordia, a holy text in Discordianism

Palladium, symbol for the chemical element.

Personal development, as used in the self development and personal growth industry

Pokémon Diamond

Photon Drop, a rare item in the video game Phantasy Star Online.

Public defender

Progressive Democrats, a political party in the Republic of Ireland

Poolday (a Counter-Strike map)

Plain Dealer, name of the newspaper based in Cleveland, U.S.

Period (punctuation), as used in coded military communication (e.g., WWII)

Partito Democratico, Partito Democratico (Pd), Italy.

Partial discharge, an undesirable discharge phenomenon in high voltage dielectrics

A photodiode is a semiconductor diode that functions as a photodetector. Photodiodes are packaged with either a window or optical fibre connection, to let in the light to the sensitive part of the device. They may also be used without a window to detect...

Partidul Democrat of Romania

Pure Data the graphical programming language

Porter Airlines IATA code

Professional Degree

Probability of Default, used in finance (Basel II)

People's Democracy, a political organization

Phelps Dodge a former mining company, now part of Freeport-McMoRan.

Privatdozent, title/position especially in the German university

Potential Difference

Preventive Detention

Partai Demokrat of Indonesia

Padua, Italy (ISO 3166-2:IT)

Pupillary Distance in Optometry

Point Defense as a prefix for weapons

Projective determinacy, a proposition in set theory

Program director

Phase-change Dual, an optical media format

Production diary

Peu difficile, a French climbing/mountaineering grade