| Rank | Abbreviation | Meaning |
|---|
| ***** | FOAS | Feelings of Abandonment Scale
| |
| ***** | FOAS | Federation of American Scientists
| |
| ***** | FOAS | Friends of the Animal Shelter of St. Bernard, Inc.
| |
| **** | FOAS | Field Operating Activities
| |
| *** | FOAS | Field Operating Agencies
| |
| *** | FOAS | Fibre Optic Acoustic Sensor
| |
| ** | FOAS | Friends of Albert Schweitzer
| |
| ** | FOAS | First Order Abstract Syntax
| |
| ** | FOAS | Falls of the Ohio Archaeological Society
| |
| * | FOAS | Friends of All Saints
| |
| * | FOAS | Friends of the Oakland Animal Shelter
| |
| * | FOAS | Fraction of a Second
| |
| * | FOAS | Future Offensive Airborne Systems
| |
| * | FOAS | Future Offensive Air System
| |
| * | FOAS | Friends of the Animal Shelter
| |
| * | FOAS | Fiber Optic Acoustic Sensors
| |
| * | FOAS | Fiber Optic Acoustic Systems
| |
| * | FOAS | Future Offensive Aircraft System
| |
| * | FOAS | Footsteps of a Stranger
| |
| * | FOAS | Fall of Autumn Skies
| |
| * | FOAS | Field Office Accounting System
| |
| * | FOAS | Funding Opportunities Announcements
| |
| * | FOAS | Friends of Animal Services
| |
| * | FOAS | Forward Operational Assessments
| |
| * | FOAS | Fried Okra Astronomical Society
| |