| Term | Full Form | Category |
|---|---|---|
| USAI | United Sciences of America Incorporated | Others |
| USAI | United Services Advisors Inc | Others |
| USAI | United Soccer Alliance of Indiana | Others |
| USAI | United States Army Infantry | Others |
| USAI | United States Army Intelligence | Others |
| USAI | United States Association of Immigrants | Others |
| USAI | University Swimming Association Inc | Others |
| USAI | Urban Science Applications Inc | Others |