In 1980, Sagan and some of his friends formed the United States Planetary Society in order to search radio waves coming to earth for signs of intelligence. As time progressed, their efforts grew increasingly sophisticated, resulting in the generation of META or the Megachannel Extra-Terrestrial Assay. BETA, or "Billion-channel Extra-Terrestrial Assay" came next. SETI or the Search for Extra-Terrestrial Intelligence is comprised of radio telescopes of varying degrees of power. In 1994, the United States Congress detached government support from SETI but the search continues.