Definition: WFC3 - a reference to World Wide Fund for Nature; I - International; R - Researcher; G - Scientist; 102 - Number; V - Volume; 2 - Second; and 0 - Zero (Numbering System). Scale.conf - is a configuration file used in NASA's Space Telescope Science Institute. This file is primarily used to configure the operational settings of various instruments on the Space Telescope Imaging Spectrometer (STIS). It specifies the dimensions and positions of each instrument, as well as any other relevant parameters for data analysis or servicing.