| Acronym | Definition |
|---|
| BLS | Bureau of Labor Statistics |
| BLS | Basic Life Support |
| BLS | Black Label Society (band) |
| BLS | Barrels |
| BLS | Below Land Surface |
| BLS | Business Law Section (various organizations) |
| BLS | British Lymphology Society |
| BLS | Bellsouth Corp. (stock symbol) |
| BLS | Boston Latin School |
| BLS | Brooklyn Law School |
| BLS | Branch if Lower or Same |
| BLS | Basic Linked System |
| BLS | B-Segment Luxury Sedan |
| BLS | Bit Line Selector |
| BLS | Bern-Lötschberg-Simplon (Swiss Railway) |
| BLS | Broadband Light Source |
| BLS | Board of Legal Specialization (various locations) |
| BLS | Business Legal Studies (various schools) |
| BLS | Bayview Loan Servicing (various loctions) |
| BLS | Bachelor of Liberal Studies |
| BLS | Blackboard Learning System (various schools) |
| BLS | Birmingham Law Society (UK) |
| BLS | Base Line Survey (UNDP) |
| BLS | Bare Lymphocyte Syndrome |
| BLS | Business Logistics Services |
| BLS | Business Level Strategy |
| BLS | Beach Landing Site (US DoD) |
| BLS | Business Logic Server (software) |
| BLS | British Lichen Society |
| BLS | Bethel Lutheran School (Cupertino, CA) |
| BLS | Built of Living Stones (US Conference of Catholic Bishops) |
| BLS | Bozzio Levin Stevens (band) |
| BLS | Byte Lane Select |
| BLS | Bioniche Life Sciences (various locations) |
| BLS | Bachelor of Library Science |
| BLS | Black Luster Soldier (Yu-Gi-Oh! Card) |
| BLS | Bloom Syndrome |
| BLS | Bacterial Leaf Streak |
| BLS | Business Listing Service |
| BLS | Bilateral Stimulation (psychologically therapeutic eye movement) |
| BLS | Business Livery Services |
| BLS | Birmingham Library Services (UK) |
| BLS | Botswana Lesotho & Swaziland |
| BLS | Beef Labelling Scheme (UK) |
| BLS | Bachelor of Legal Studies |
| BLS | Bluegrass Laminitis Symposium (Louisville, KY) |
| BLS | Broadband Licensing System (FCC) |
| BLS | Bottom Left Side |
| BLS | Basic Living Stipend (Honor Harrington science fiction novels) |
| BLS | British Longevity Society |
| BLS | Band-Limited Signal |
| BLS | Basic Limousine Service (EMS slang) |
| BLS | Banner Linen Service (Bay City, Michigan) |
| BLS | Bank of Lee's Summit |
| BLS | Blaine Station (Blaine, Washington, border patrol station) |
| BLS | Bornes Libres Service (French: Self Service Kiosks) |
| BLS | Block Line Set |
| BLS | Bachelor of Leisure Studies |
| BLS | Biggins Lacey Sahiro & Company |