Advanced Dungeons & Dragons 1st edition (1977-1988)
Demons appear in the first edition Monster Manual (1977), which includes the manes (sub-demon), the succubus, the type I demon (vrock), the type II demon (hezrou), the type III demon (glabrezu), the type IV demon (nalfeshnee, etc.), the type V demon (marilith, etc.), the type VI demon (balor, etc.), and demon lords Demogorgon (Prince of Demons), Juiblex (The Faceless Lord), Orcus (Prince of the Undead), and Yeenoghu (Demon Lord of Gnolls). The quasit, a frequent servant of demons, also first appeared in the original Monster Manual.
Lolth, the Demon Queen of Spiders is described under the demon entry in the Fiend Folio (1981)
Several new demons debuted in the module Lost Caverns of Tsojcanth (1982), including the alu-demon (demi-demon), the bar-lgura (minor demon), the chasme, the dretch, and the rutterkin (minor demon), and new demon lords Baphomet, Fraz-Urb'luu (Prince of Deception), Graz'zt (demon prince), and Kostchtchie (demon lord). The alu-demon (semi-demon), babau (minor demon), bar-lgura (minor demon), cambion baron/marquis and cambion major (semi-demon), chasme (minor demon), dretch (minor demon), nabassu (major demon), and rutterkin (minor demon) appeared in the first edition Monster Manual II (1983), along with demon lords Baphomet (demon lord), Fraz-Urb'luu (Prince of Deception), Graz'zt (demon prince), Kostchtchie (demon lord), and Pazuzu (Prince of the Lower Aerial Kingdoms).
The goristro (major demon) first appeared in Dragon #91 (November 1984); the article's author, Gary Gygax, explained that he had intended to put the creature into Monster Manual II along with the other demons.
The demoness Zuggtmoy first appeared and played a major role in the Temple of Elemental Evil module (1985). Orcus was a central antagonist for The Throne of Bloodstone series of adventures, appearing in The Throne of Bloodstone (1988), along with Baphomet, the Dire Whiner, Klavikus the type IV demon guardian, and Glyphimor, Lord of Orcusgate.