| Student Achievement And Success Program | Academic & Science |
| Student Academic Success Program | Academic & Science |
| Sacramento Area Science Project | Academic & Science |
| Society of Australasian Social Psychologists | Academic & Science |
| South African Society of Physiotherapy | Academic & Science |
| Structured Approach To Strategic Purchasing | Business |
| Society of Australian Social Psychologists | Business |
| Sino-american S | Business |
| Student Affiliates in School Psychology | Community |
| Simple Access Signaling Protocol | Computing |
| Single Acoustic Signal Processor | Computing |
| Self Addressed Stamped Postcard | General |
| Surface Air Sampling Program | General |
| Swamp Angel Study Plot | General |
| Special Admissions Support Program | General |
| Self Assessment Study Program | General |
| State Aviation System Plan | General |
| Student Auxiliary Safety Patrol | General |
| Senescence Associated Secretory Phenotype | General |
| Single Authorisation for simplified procedures | General |
| Special Assistant for Strategic Planning | General |
| Spectral Audio Signal Processing | General |
| Salao Do Automovel de Sao Paulo | General |
| State Agencies for Surplus Property | Governmental |
| Sexual Assault Services Program | Governmental |
| South Asian Studies Program | International |
| Small Acid-Soluble Protein | Medical |
| Special Ammunition Supply Point | Military and Defence |
| Server / Application State Protocol | Networking |
| Science and Applications Space Platform | Space Science |
