<Table> <Tr> <Td> "Good Old Desk" (1967) </Td> <Td> "One" (1968) </Td> <Td> "Everybody's Talkin"' (1968) </Td> </Tr> </Table> <Tr> <Td> "Good Old Desk" (1967) </Td> <Td> "One" (1968) </Td> <Td> "Everybody's Talkin"' (1968) </Td> </Tr> <P> "One" is a song written by Harry Nilsson and made famous by Three Dog Night whose recording reached number five on the U.S. Billboard Hot 100 in 1969 and number four in Canada . The song is known for its opening line "One is the loneliest number that you'll ever do". Nilsson wrote the song after calling someone and getting a busy signal . He stayed on the line listening to the "beep, beep, beep, beep ..." tone, writing the song . The busy signal became the opening notes of the song . </P> <P> In 1968, Al Kooper released the song on his debut album I Stand Alone . In 1969, the song was recorded by Australian pop singer Johnny Farnham, reaching number four on the Go - Set National Top 40 Chart . </P>

Who wrote the song one is the loneliest number