http://setiathome.ssl.berkeley.edu/
[...]
May 17, 1999. Launch! We will release the Windows and Mac versions at 8:00
AM PDT. We made a snapshot of statistics from the beta-testing period, and
reset all totals to zero.
[...]
SETI@home is a commensal SETI sky survey at the National
Astronomy and Ionospheric Center's 305 meter radio telescope in
Arecibo, Puerto Rico. The sky survey covers a 2.5 MHz bandwidth
centered at 1420 MHz, as many researchers have suggested the 21 cm
Hydrogen line as the most likely band for intentional interstellar
transmissions to be lurking. The survey covers 28% of the sky
(declinations ranging from +1 to +35 degrees) with a sensitivity of
3E-25 W/m2. SETI@home observations will span a total of two years,
during which most of the sky will be observed two or three times.
Observations began in October 1998.
Much of the SETI@home data analysis is accomplished using distributed computing with the help of hundreds of thousands of participants and their internet connected computers (Sullivan et al 1997).