| Acronym | Meaning |
| INDIGO | (U.S.) INtelligence DIvision Gaming Operation |
| OCFS | Oracle Cluster File System |
| HURD | Hird Of Unix-Replacing Daemons (cf. Hird) |
| DCI | Detection |
| ITAG | Inertial Terrain-Aided Guidance |
| SSE | South South-East -Streaming SIMD Extensions |
| AT | Astatine |
| CASE | Cellular Ammunition Storage Equipment - Computer-Aided Software Engineering |
| PCL | Passive Coherent Location |
| VSOP | Variations S?culaires Des Orbites Plan?taires (French |