| B&ASO | Body and Assembly Stamping Operations 
| Others |
| BASo | BAILA Society
| Others |
| BASO | Bay Area Site Office
| Others |
| BASO | Belgian Association for the Study of Obesity
| Others |
| BASO | Bethany Advocates and Support Organization
| Others |
| BASO | Bharat Ahshara Social Organization
| Others |
| BASO | Bhutanese American Student Organization
| Others |
| BASO | Biomedical Analytics and Systems Optimization
| Others |
| BASO | Brandeis African Students Organization
| Others |
| BASO | British Association of Surgical Oncologists
| Others |
| BASO | British Association of Surgical Oncology
| Others |
| BASO | Builders Association Southern Oregon
| Others |
| BASO | Bulletin of the American Schools of Oriental Research
| Others |