Billboard began in 1894 as Billboard Advertising, a modest, eight-page trade journal for the advertising industry. As the entertainment industry embraced recorded media, the magazine followed and, in 1940, published its first music chart. Over the next several decades, it introduced several new charts (including ones tracking performance outside the US) and changed others’ names, indirectly defining the genre lines of American music. Today, the Hot 100, which measures songs, and the Billboard 200, which measures albums, are industry standards.
As technology has evolved, Billboard has periodically revised its methodology to reflect listening habits. The magazine incorporated streaming data into its charts’ methodologies in 2007. The change has led to significant changes for the charts, yielding unexpected hits and, in some cases, accusations of manipulation.