IT

"IT: The History of Pop Music" is a program that XM Satellite Radio aired annually from 2002 to 2007, in which a majority of charted pop songs (and some non-charted songs) from the 1930s to the 2000s were aired in chronological order on seven of the platform's channels (The 40s on 4, The 50s on 5, The 60s on 6, The 70s on 7, The 80s on 8, The 90s on 9, and Pop2K (formerly XM Hitlist)). The special typically aired each summer or fall, starting on the '40s channel and continuing on each subsequent channel as the music hit each decade. The special took just over a month to complete. After completion, playlists for each of the channels were put on XM's website, with the songs listed in the order in which they were played (in 2007, one large list was put up on the website, with the songs organized by year, but in alphabetical order instead of chronological order).