The Search for Extraterrestrial Intelligence. Institutes and programs for scientific and educational projects relevant to the nature, distribution, and prevalence of life in the universe.

The Optical Search for Extraterrestrial Intelligence. OSETI searches for pulsed and continuous visible and infrared spectrums of light, not radio or microwave frequency wavelengths.
SETI@home is the University of California Berkeley's distributed computing project sorting through radio signals to search for extraterrestrial intelligence.