| Acronym | Definition |
|---|
| RBA | Rare Bird Alert |
| RBA | Ritchie Bros. Auctioneers (Canada) |
| RBA | Relative Byte Address |
| RBA | Ranger Body Armor |
| RBA | Regionalbus Augsburg GmbH (German) |
| RBA | Regents Bachelor of Arts (various universities) |
| RBA | Royal Bhutan Army |
| RBA | Redwood Bluegrass Associates (Mountain View, CA; est. 1991) |
| RBA | Regional Brevet Administrator (Randonneurs USA) |
| RBA | Refined Bitumen Association (UK; trade association) |
| RBA | Rabat, Morocco - Sale (Airport Code) |
| RBA | Radiological Buffer Area |
| RBA | Richmond Baptist Association |
| RBA | Red Blooded American |
| RBA | Residence-Based Advising (Massachusetts Institute of Technology; Cambridge, MA) |
| RBA | Reduced Bias Adjustment |
| RBA | Rescue Breathing Apparatus |
| RBA | Radar Beacon Acquisition |
| RBA | Reservation-Based Algorithm |
| RBA | Reentry Body Assembly |
| RBA | Refined Born Approximation |
| RBA | Repeat and Blockwise Accumulate (Code) |
| RBA | Radio Base-Station Antenna |
| RBA | Response-Time-Based Best-Effort Resource Allocation |
| RBA | Ready Basic Aircraft (Naval Aviation Entreprise) |
| RBA | Request for Bid Approval |
| RBA | Run Book Automation |
| RBA | Royal Society of British Artists (London, UK) |
| RBA | Risk Based Approach |
| RBA | Results Based Accountability |
| RBA | Rights-Based Approach |
| RBA | relative binding affinity |
| RBA | Rochester Business Alliance |
| RBA | Retail Bakers of America (McLean, Virginia) |
| RBA | Role-Based Architecture (computing) |
| RBA | Rentable Building Area (commercial real estate) |
| RBA | Resource Based Advantage (human resources) |
| RBA | Retailer's Bakery Association (Laurel, Maryland) |
| RBA | Reserve Bank of Australia |
| RBA | Revolution in Business Affairs |
| RBA | Request for Board Action (various locations) |
| RBA | Richmond Baseball Association |
| RBA | Royal Brunei Airlines (ICAO code) |
| RBA | Real Brushed Aluminum (vehicles) |
| RBA | Reformed Blacks of America (Philadelphia, PA) |
| RBA | Rules Based Automation |
| RBA | Receptor Binding Assay |
| RBA | Rehoboth Baptist Association |
| RBA | Reimbursable Budget Authority |
| RBA | River Basin Authority (various locations) |