| Acronym | Meaning |
| RFI | Ready For Inspection - Ready For Issue - Request For Information - Radio Frequency Interference |
| DASD | (U.S.) Deputy Assistant Secretary Of Defense |
| DDA | Digital Differential Analyzer - Deputy District Attorney |
| SE | Northern Sami Language (ISO 639-1 Code) |
| IU | Inuktitut Language (ISO 639-1 Code) |
| Y | Yotta - Yttrium |
| SQUID | Superconducting QUantum Interference Device |
| JY | Japanese Yen |
| AVP | Arubaanse Volkspartij |
| SBCS | Single-Byte Character Set |