"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)).
In 2007, in addition to the regular "IT", XM also aired an abbreviated version (titled "The Greatest ITs") on their XMX channel during Thanksgiving weekend.
The channel also included early non-charted songs from Elvis Presley and other rock and roll and rhythm and blues artists.
Unlike the previous two decades channels, many lesser Top 40 hits were omitted, and there were many more non-Top 40 songs included.
The 2007 version also was plagued with many technical problems, including some songs being played out of order or repeated several times.
"IT" on XM30 (the XM Hitlist channel) included Top 40 and non-Top 40 hits from 2000 and after in chronological order.