| Acronym | Meaning |
| NHAP | National High Altitude Photography |
| ITVM | Integration |
| GTC | Gigatons Of Carbon |
| PP | Parts Per |
| MODS | Mission Operations And Data Systems |
| ATR | Attenuated Total Reflection |
| AD&D | Accidental Death And Dismemberment |
| BIGIT | A Binary Digit |
| DDC | Defense Documentation Center |
| IERS | International Earth Rotation Service |