From Britannica Library Reference Center:
Although widely considered a synonym for rap music, the term hip-hop refers to a complex culture comprising four elements: deejaying, or “turntabling”; rapping, also known as “MCing” or “rhyming”; graffiti painting, also known as “graf” or “writing”; and “B-boying,” which encompasses hip-hop dance, style, and attitude, along with the sort of virile body language that philosopher Cornel West described as “postural semantics.” Hip-hop originated in the predominantly African American economically depressed South Bronx section of New York City in the late 1970s. As the hip-hop movement began at society’s margins, its origins are shrouded in myth, enigma, and obfuscation.

3 Feet High and Rising
by
The Chronic
by
All Hail the Queen
by
Fear of a Black Planet
by
Are You Still Down?
by
The Best of Grandmaster Flash
Beats, Rhymes, and Life
by
Doggystyle
by
Beats, rhymes & life: the travels of a Tribe Called Quest
NAS: Time is Illmatic