This part of ISO 14132 applies to astronomical telescopes and gives terms and definitions for astronomical telescopes only. The alphabetical indexes of terms in English, French, Russian and German that are common for all published parts of ISO 14132 are published in ISO 14132-1. The definitions may be changed, if required, by introducing derivative attributes into them, revealing the meanings of the terms used, showing the objects covered by the scope of the notion being defined. These changes shall not affect the scope and contents of this part of ISO 14132. NOTE In addition to terms used in the three official ISO languages (English, French and Russian), this part of ISO 14132 gives the equivalent terms and definitions in the German language; these are published under the responsibility of the member body for Germany (DIN). However, only the terms and definitions given in the official languages can be considered as ISO terms and definitions.