The Grouped Discourses
The Samyutta Nikaya, the third division of the Sutta Pitaka, contains 2,889 suttas grouped into five sections (vaggas). Each vagga is further divided into samyuttas, each of which in turn contains a group of suttas on related topics. The samyuttas are named according to the topics of the suttas they contain. For example, the Kosala Samyutta (in the Sagatha Vagga) contains suttas concerning King Pasenadi of Kosala; the Vedana Samyutta (in the Salayatana Vagga) contains suttas concerning feeling (vedana); and so on.
Sagatha-vagga — The Section of Verses
Nidana-vagga — The Section on Causation
Khandha-vagga — The Section on the Aggregates
Salayatana-vagga — The Section on the Six Sense Bases
Maha-vagga — The Great Section