| Acronym | Meaning |
 | GEM | Giotto Extended Mission |
| FFT | Fast Fourier Transform |
| FBV | Fuel Bleed Valve |
| NAS | Numerical Aerodynamic Simulation |
| MOPITT | Measurements Of Pollution In The Troposphere |
| CRISTA | Cryogenic Infrared Spectrometer Telescope For Atmosphere |
| MOTV | Manned Orbital Transfer Vehicle |
| CNES | Centre National D'Etude Spatiales |
| INTELSAT | International Telecommunications Satellite |
| MPC | Minor Planets Circular |
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