| Acronym | Meaning |
| NA | Nauruan Language (ISO 639-1 Code) |
| ISIS | Institute For Science And International Security |
| CCII | Command And Control Information Infrastructure |
| HSMAD | Human Science/Modeling And Analysis Data |
| CESS | Centre For Earth Science Studies (India) |
| PTFE | PolyTetraFluoroEthylene |
| QUIET | Q And U Imaging ExperimenT (Q And U Are The Stokes Parameters Of The CMBR Polarization) |
| TR | Turkish Language (ISO 639-1 Code) |
| DIP | Dual In-line Package (electronics) |
| AADD | Atlanta Alliance On Developmental Disabilities |