- barium: a soft silvery metallic element of the alkali earth group; found in barite
- Bachelor of Arts: a bachelor's degree in arts and sciences
- .ba is the Internet country code top-level domain (ccTLD) for Bosnia and Herzegovina. It is administered by the University Teleinformation Center.
- Bet, Beth, or Vet is the second letter of many Semitic abjads, including Phoenician, Aramaic, Hebrew ב Syriac and Arabic alphabet '''' ﺏ. Its value is a voiced bilabial plosive, .
- Ba is a district situation on the North Western part of the island of Viti Levu in Fiji. The name Ba is also used for a province, a tikina (A native Fijian administrative region comprising several villages), a town and a river. ...
- The Ancient Egyptians believed that a human soul was made up of five parts: the Ren, the Ba, the Ka, the Sheut, and the Ib. In addition to these components of the soul there was the human body (called the ha, occasionally a plural haw, meaning approximately sum of bodily parts). ...
- Bachelor of Arts (B.A. or A.B.), from the Latin artium baccalaureus, is a bachelor's degree awarded for an undergraduate course or program in either the liberal arts, the sciences, or both. ...
- Ba Open is an electoral division of Fiji, one of 25 open constituencies elected by universal suffrage (the remaining 46 seats, called communal constituencies, are allocated by ethnicity). ...
- The ISO 3166-1 two-letter (alpha-2) code for Bosnia and Herzegovina
- In ancient Egyptian mythology, a being's soul or personality, represented as a bird-headed figure, which survives after death but must be sustained with offerings of food; (obsolete) To kiss
- (BAE) British Actors Equity
- (BAE) British Aerospace, a 42½ % shareholder in Panavia
- (BAS) Building Automation System.
- (BAS (Book of Alternative Services)) Some prefer to worship in the language of the Book of Alternative Services which was published in 1985. ...
- (BAS) Basic Allowance for Subsistence – monthly food assistance provided to members who do not eat a military facilities.
- (BAS) School of Behavioral and Applied Sciences
- (BAS (Business Activity Statement)) Used by businesses to report their tax entitlements and obligations, including the amount of GST they have received and paid.
- (BAS) 1. Big Ass Salad; 2. Big Ass Steak. Context is important here: “I went to a restaurant and had a BAS with a BAS.” Take your pick which came first.
- (BAS) A Business Activity Statement is the statement from the ATO which is completed and lodged usually on a quarterly basis. It encompasses return information for GST, PAYG income tax instalment and PAYG Withheld.
- (BAS) BASic; (bass) – this intermediate file is the text form of your ROD. While this file appears to be code, it is not itself editable, compilable, or able to reconstitute a ROD–except by hand… painfully. It may also be a globally available library file containing external functions used in a ROD.
- (BAS) Beef Assurance Scheme
- (BAS) Behaviour and Attendance Service
- (BAS) Bit-rate Allocation Sequence in H.221. Capabilities exchange uses these codes.
- (BAS) Boundary and Annexation Survey
- (BAS) Brake Assist System (Mercedes Benz, 1990s), electronics detect sudden application of brakes and increase braking effect under the assumption that this is, or should be, a panic stop.