| BESS | Balance Error Scoring System 
| Others |
| BESS | Balloon-borne Experiment with a Superconducting Spectrometer
| Others |
| BESS | Baltimore Educational and Social Society
| Others |
| BESS | Barracuda e-Mail Security Service
| Others |
| BESS | Basic Echo Synchronizing System
| Others |
| BESS | Basic Enlisted Submarine School
| Others |
| BESS | Battery Electric Storage System
| Others |
| BESS | Battery Energy Storage System
| Others |
| BESS | Battery Energy Storage Systems
| Others |
| BESS | Bekeley Extension Software Switch
| Others |
| BESS | Benefits Eligibility Screening Services
| Others |
| BESS | Berkeley Extensible Software Switch
| Others |
| BESS | Bilston And Ettingshall Sure Start
| Others |
| BESS | Biodegradability Evaluation And Simulation System
| Others |
| BESS | Biomedical Experiment Scientific Satellite
| Others |
| BESS | Biomedical Experiment Support Satellite
| Others |
| BESS | Biomedical Experiments Scientific Satellite
| Others |
| BESS | Bit Error Sensing System
| Others |
| BESS | Blackpool Empowering Social Support
| Others |
| BESS | Bloomberg Essentials
| Others |
| BESS | Brain Edema Severity Score
| Others |
| BESS | Breaking Electroweak Symmetry Strongly
| Others |
| BESS | Breathing Earth System Simulator
| Others |
| BESS | British Elbow and Shoulder Society
| Others |
| BESS | Buddhist Education Services for Schools
| Others |
| BESS | Buddies Empowering Self Sufficiency
| Others |
| BESS | Build Environment Sustainability Scorecard
| Others |
| BESS | Business Economic and Social Science
| Others |
| BESS | Business Education and Social Sciences
| Others |
| BESS | Business Entity Search Station
| Others |