baptized, in genealogy.

bipolar disorder, in psychiatry.

blood pressure, in medicine.

Robert Baden-Powell, 1st Baron Baden-Powell, founder of the world scouting movement (the proper abbreviation would be "B-P").

Bishop, in the Christian Church; when the term Bp. follows the name of a Christian saint it denotes that the saint was a Bishop.

Budapest, capital of Hungary.

cal BP, a calibrated value of before present with respect to radiocarbon dating, implying a more reliable figure with less uncertainty.

BP, an energy corporation, formerly known as British Petroleum.

Baseball Prospectus, statisical website and series of annuals.

beer pong, a popular drinking game.

Bell's Palsy, a generally temporary paralysis of the face.

Bletchley Park, a British cryptography installation, was referred to as "BP" so that those making inquiries would assume the speaker meant British Petroleum without the speaker having to directly lie.

Banco Popular, a financial institution in Puerto Rico.

Bishweshwar Prasad Koirala, the Prime Minister of Nepal from 1959 to 1960.

Benny Parsons, NASCAR champion in 1973 and former long-time NASCAR commentator.

Bechuanaland Protectorate, the forerunner of modern Botswana

boiling point, in chemistry.

base pair, in genetics.

Mazda B engine, for the Mazda BP engine.

Boerenpartij, a Dutch political party.

British Pharmacopoeia, a collection of medical standards, abbreviated as "BP" to signal a conforming ingredient such as "Hydrocortisone BP".

Benzoyl peroxide, an acne and teeth whitening medicine, abbreviated as "BP" to modify a commercial name such as "Clearasil BP".

Bohlen-Pierce scale, a musical scale.

British Parliamentary Style, a debating style.

Before Present, in social sciences such as history, archeology, climatology, et al. (most common suffixed use in literature; normally used with respect to dates established by radiocarbon dating.) By convention, "present" is assumed to be 1950.

Air Botswana, IATA code.

Bharat Petroleum, an Indian oil company.

IF Brommapojkarna, a Swedish football team.

Boston Pizza, a Canadian restaurant chain.

basis point, in finance.

boarding pass, in transport.

Brown–Peterson cohomology

Boron phosphide.

British Petroleum Canada the Canadian subsidiary

Bloc Party, a British indie rock band.

Solomon Islands, FIPS Pub 10-4 and obsolete NATO digram.

binge eating/purging, in describing symptoms of bulimia