| Acronym | Meaning |
| ASI | Agenzia Spaxiale Italiano |
| SAM I | Sensing With Active Microwaves |
| PSI | Pounds Per Square Inch |
| BOD | Beneficial Occupancy Date |
| EOSIS | EOS Information System |
| ACRIM | Active Cavity Radiometer Irradiance Monitor |
| LSX | Land Surface Transfer Scheme |
| ADARS | Aircraft Data Acquisition And Recoding System |
| DNS | Direct Numerical Simulation |
| IEA | International Energy Agency |