Linked from
The 9 pages that link to Neume, each with the reason it gives.
Gregorian chantRelated: Early chant manuscripts used neumes to record melodic contours.
Musical notationBroader topic: Neumes document an early stage in Western written music.
MelismaBroader topic: Some neumes indicate groups of pitches sung on a single syllable.
Medieval musicRelated: They preserve melodies from before staff notation became standard.
ClefNarrower topic: Neumatic notation preceded the staff-based pitch assignments that clefs enable.