The Bernese GNSS software was first developed in the 1980s by the University of Bern, Switzerland. Initially, it was designed to process GPS (Global Positioning System) data, but later versions were extended to handle data from other GNSS systems, such as GLONASS (Russian), Galileo (European), and BeiDou (Chinese). The software has undergone significant improvements over the years, with new features and algorithms being added to enhance its performance and accuracy.