The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Filipino: Pangasiwaan ng Pilipinas sa Serbisyong Atmosperiko, Heopisiko, at Astronomiko, abbreviated as PAGASA, which means "hope" in the Tagalog word pag-asa) is the National Meteorological and Hydrological Services (NMHS) agency of the Republic of the Philippines mandated to provide protection against natural calamities and to insure the safety, well-being and economic security of all the people, and for the promotion of national progress by undertaking scientific and technological services in meteorology, hydrology, climatology, astronomy and other geophysical sciences.