RD51 Collaboration for Development of Micro-Pattern Gas Detector Technologies (https://rd51-public.web.cern.ch/) is a CERN-based collaboration that involves about 450 authors from 89 Universities and Research Laboratories from 31 countries in Europe, America, Asia and Africa. The main objective of its R&D program is to advance technological development and application of Micropattern Gas Detectors through fostering collaboration between different research groups around the world.