Oldies is a radio format that concentrates on rock and roll and pop music from the latter half of the 20th Century, specifically from around the mid 1950s to the 1970s or 1980s.
In the 1980s and 1990s, "oldies" meant the 15 years from the birth of rock n roll to the beginning of the singer-songwriter era of the early 1970s, or about 1955 to 1972, although this varied and some stations chose 1950–1969. After 2000, 1970s music was increasingly included, and early 1980s music is beginning to also be called "oldies", though the term "classic hits" is used to distinguish the "new" oldies (the Generation X oldies) from the "old" oldies (the Baby Boomer oldies).
Oldies tunes are typically from R&B, pop and rock music genres. Country, jazz, classical music, and other formats are generally not considered oldies music, although some of those genres have their own oldies format (for instance, classic country), and a number of songs "crossed over" from country to Top 40. Occasionally the term is used to describe the rare station that includes 1940s music as well, although music from before 1955 (coinciding with the "birth of rock'n'roll") is typically the domain of the adult standards format. However, the term constitutes ambiguity for people who like old dancing music.
This format is sometimes called Golden Oldies (after another album series of the same name, which was sold through bulk TV commercials), though this term usually refers to music exclusively from the 1950s and 1960s. Oldies radio typically features artists such as Elvis Presley, Chuck Berry, The Beatles, The Beach Boys, The Animals, The Four Seasons, and Sam Cooke; as well as such musical movements and genres as doo-wop, rockabilly, rock and roll, early rock music, Motown, British Invasion, early girl groups, surf music, teen idol singers, teenage tragedy songs, and bubblegum pop. One notable omission from most oldies playlists is the music of the folk revival of the early 1960s.