The Billboard 200, published in Billboard magazine, is a weekly chart that ranks the highest-selling music albums and EPs in the United States. In 1983, the name of the chart was Top LPs & Tape. Before Nielsen SoundScan began tracking sales in 1991, Billboard estimated sales from a representative sampling of record stores nationwide, using telephone, fax or messenger service. Data were based on rankings made by the record stores of the best-selling records, not on actual sales figures. There were six number-one albums on this chart in 1983, including the debut album of the Australian band Men at Work, Business as Usual, which spent the last seven weeks of 1982 and the first eight weeks of 1983 at number one, and was certified quadruple platinum by the Recording Industry Association of America (RIAA) in 1984. Thriller, the sixth studio album by recording artist Michael Jackson, was released on November 1982. It peaked at number one for twenty-two non-consecutive weeks in 1983 with another fifteen consecutive weeks at the top into the following year, and seven songs from the album became top ten singles between late 1982 and early 1984. Two of them: "Billie Jean" and "Beat It", reached the top position of the Billboard Hot 100. Thriller won eight Grammy Awards, including Album of the Year at the 26th Grammy Awards, and was the best-selling album of 1983 with more than fifteen million copies sold. In 2008, twenty-five years after its release, the record was inducted into the Grammy Hall of Fame, and a few weeks later, it was among twenty-five recordings preserved by the Library of Congress to the National Recording Registry as "culturally significant". Flashdance, the soundtrack to the 1983 musical and romance film of the same name, peaked at number one for two weeks and won the Grammy Award for Best Score Soundtrack Album for a Motion Picture. The two singles released from the album, "Flashdance... What a Feeling" by Irene Cara, and "Maniac" by Michael Sembello, reached the top of the singles chart in 1983. The New York Times considered the British band The Police to be the year's most influential rock band. Australian, British, and American bands copied the white-reggae formula of their (The Police's) earlier successes. The group released their fifth and final studio album, Synchronicity, in 1983. The album, a varied accomplished blend of rock, funk, and third-world rhythms, stayed at number