p5

(politics) Abbreviation of power 5 (“the five permanent members of the United Nations Security Council (France; formerly the Republic of China, but now the People's Republic of China; the United Kingdom; the United States of America; and formerly the Soviet Union, but now Russia)”).

Abbreviation of priority five, the lowest, least important, priority or importance level, usually.

(slang, electronics, obsolete) Initialism of Pentium 5 a slang term used to refer to the successor to the Pentium 4 before the name was revealed by Intel.