Initialism of business system analyst. / (biochemistry) Initialism of bovine serum albumin. / (medicine) Initialism of body surface area.

(Scouting) Initialism of Boy Scouts of America.

Initialism of Bombay Stock Exchange.

(medicine, neurology) Initialism of bovine spongiform encephalopathy. / Initialism of Bachelor of Science in Engineering. / (medicine) Initialism of breast self-examination.

(UK, Commonwealth of Nations, Ireland) Abbreviation of Bachelor of Science.

(computing) Initialism of blue screen of death. / (computing) Initialism of black screen of death.

(computing) For a computer system to fail critically and display a blue screen of death.

(historical) Initialism of British Standard Time (between 1968 and 1971) / Initialism of British Summer Time.

(computing, graph theory) Initialism of binary search tree. / (paleontology) Initialism of Burgess Shale Type.

(Australia, computing) Initialism of Business Software Association of Australia. / (historical) Initialism of British South American Airways.