| Acronym | Meaning |
 | ZS | Zeptosecond |
| WFF | Wallops Flight Facility |
| YI | Yobi |
| ITS | Incompatible Time-sharing System - Individual Training Standards |
| SJ | Svalbard And Jan Mayen (ISO 3166 Digram) -Societas Iesu (Latin: The Society Of Jesus |
| SSA | Cargo Submarine (US Navy Hull Classification) |
| JSD | Juris Scientiae Doctor (Latin |
| FW | Forward |
| MACHO | MAssive Compact Halo Object |
| NCDDR | U.S. National Center For The Dissemination Of Disability Research |
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