noun

• (electronics) Initialism of personal digital assistant. [(dated) A hand-held electronic organizer or computer.]
• (colloquial) Initialism of public display of affection. [An act of physical intimacy in the view of others.]
• (computing theory) Initialism of pushdown automaton. [(computing theory) An automaton with finitely many states that can also use one unbounded stack of memory; the automaton may only push, pop, or read the top of the stack. Abbreviation: PDA.]
• Initialism of property damage accident.
• Initialism of pathological demand avoidance.
• (medicine) Initialism of patent ductus arteriosus.
• (manufacturing) Initialism of production data acquisition.
• (medicine) Initialism of peridural anesthesia.
• (cryptocurrencies, Solana) Initialism of program derived address.