(computing, formal) petabyte (1,000 terabytes or 10¹⁵ bytes). / (computing, informal) pebibyte (2¹⁰ (1024) tebibytes or 2⁵⁰ (1024⁵) bytes).

Initialism of peanut butter. / (sports) Initialism of personal best. / (philately) Initialism of plate block. / (finance) Initialism of prime broker or prime brokerage.

Abbreviation of Paraíba. (Brazilian state)

(US, biology) Initialism of phosphate-buffered saline: a buffer solution commonly used in biological research. / (management) Initialism of product breakdown structure.

(US, television) Initialism of Public Broadcasting Service. / (Australia) Initialism of Pharmaceutical Benefits Scheme. / (Malta) Initialism of Public Broadcasting Services.

(computing, formal) petabit (1000 terabits or 1000⁵ bits) / (computing, informal) pebibit (2¹⁰ (1024) tebibits or 2⁵⁰ (1024⁵) bits)

plural of PB

Initialism of peanut butter and jelly or peanut butter and jam, a sandwich made using these ingredients.

plural of PB&J

Initialism of polybrominated biphenyl. / (aviation) Initialism of passenger boarding bridge.; Synonym of jet bridge