| Acronym | Meaning |
| LPC | Large Particle Count |
| MRI | Minority Research Initiation |
| M-PDU | Multiplexed Protocol Data Unit |
| MPR | Advanced Microwave Precipitation Radiometer |
| ACO/UK | ACO/United Kingdom |
| TCAS-II | Traffic Alert And Collision Avoidance System |
| ATLAS | Airborne Tunable Laser Absorption Spectrometer |
| CASH | Commercial Aviation Sensing Of Humidity |
| VLBI | Very Long Baseline Interferometry |
| ASI | Agenzia Spaxiale Italiano |