Initialism of Provider Backbone Bridges.

(telecommunications) Initialism of private branch exchange.

Initialism of Professional Bowlers Association. / Initialism of Philippine Basketball Association. / Initialism of Patrolmen's Benevolent Association. / Initialism of Prevent Blindness America.

Abbreviation of partial-birth abortion. / Initialism of pattern of business activity. / pattern of business activities / patterns of business activity / patterns of business activities

Initialism of Professional Bull Riders, a sport, circuit, and company for bull riding / Initialism of Pabst Blue Ribbon, a brand of beer

Initialism of patrol boat, rigid, a type of river patrol boat used by the US Navy during the Vietnam War

Initialism of pediatric bipolar disorder.

(networking) Initialism of Provider Backbone Transport. / (law enforcement) Initialism of Preliminary Breath Test. / (organic chemistry) Initialism of polybutylene terephthalate.

Initialism of Pension Benefit Guaranty Corporation.

(Islam, proscribed, initialism) Peace be upon him; an honorific phrase used by some Muslims after any mention in speech or print of the Islamic prophet Muhammad or any other prophets or chosen figures believed by the majority of Muslims to be sent by God (Allah).