| ASTRON | Stichting Astronomisch Onderzoek in Nederland http://www.astron.nl/ | 
| AD n, m | Reference to Applicable Documents n and m (see Section 1.7) | 
| AO | Adaptive Optics | 
| AT | Auxiliary Telescope (of the VLTI) | 
| DDL | Differential Delay Line | 
| EPFL | École Polytechnique Fédérale de Lausanne http://www.epfl.ch/ | 
| ESO | European Southern Observatory http://www.eso.org/ | 
| MACAO | Multi Application Curvature Adaptive Optics | 
| PS | Primary Star | 
| PSF | Point Spread Function | 
| S/N | Signal-to-noise ratio (signal / noise) | 
| SeS | Secondary Star | 
| STRAP | Tip-tilt corrector at the Auxiliary Telescopes | 
| StS | Star Separator | 
| VLTI | Very Large Telescope Interferometer http://www.eso.org/projects/vlti/ |