| 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 |