| BAC | Bacterial Artificial Chromosome | - | Computer Acronyms(common) |
| BAC | Biological Activated Carbon | - | Computer Acronyms(common) |
| BAC | Bacterial Artificial Chromosome | - | Medical |
| BAC | Blood Alcohol Content | - | Medical(slang) |
| BAC | Boeing Aircraft Company | - | Organizations |
| BAC | Booster Assembly Contractor | - | Organizations |
| BAC | Buffer Access Card | - | Organizations |
| BAC | Back At Computer | - | Sms Text Smileys and Emoticons |
| BAC | Bad Ass Chick | - | ISO Country Codes |
| BAC | Bohica Associates Corporation | - | Astronomy |
| BAC | Biosphere-Atmosphere Chemistry | - | Business and Finance |
| BAC | Budgeted Cost At Completion | - | Business and Finance |
| BAC | Boeing Airplane Company | - | Business and Finance |
