Kool Moe Dee in the context of "Beastie Boys"

Old-school hip-hop, stylized as old skool (originally known as disco-rap) is the earliest commercially recorded hip-hop music and the original style of the genre. It typically refers to the music created around 1973 to 1983, as well as any hip hop that does not adhere to contemporary styles.

The image, styles and sounds of old-school hip hop were exemplified by figures like Disco King Mario, DJ Hollywood, Grandmaster Flowers, Grand Wizzard Theodore, Grandmaster Flash, Afrika Bambaataa, DJ Kool Herc, Treacherous Three, Funky Four Plus One, Kurtis Blow, The Sugarhill Gang, Melle Mel, Super-Wolf, West Street Mob, Spoonie Gee, Kool Moe Dee, Busy Bee Starski, Lovebug Starski, The Cold Crush Brothers, Warp 9, T-Ski Valley, Grandmaster Caz, Doug E. Fresh, The Sequence, Jazzy Jay, Crash Crew, Rock Steady Crew, and Fab Five Freddy.

The Treacherous Three was a pioneering American hip hop group that was formed in 1978 and consisted of DJ Easy Lee, Kool Moe Dee, L.A. Sunshine, Special K and Spoonie Gee (who left in the late 1970s), with occasional contributions from DJ Dano B, DJ Reggie Reg and DJ Crazy Eddie. They first appeared on record in 1980 on the B-side of Spoonie Gee's single, "Love Rap".