Early Buddhism
Mostly only Suttas and Vinaya, some commentary
Theravada (eventually centered in Sri Lanka)
Descends directly from Buddha's disciples
First Buddhist Council, attended by 500 elders (Theras) compiled teachings into Dharma (Suttas) and Vinaya.
Confirmed at Second Buddhist Council
Tripitaka finalized at Third Buddhist Council to include Commentaries (Abhidhamma)
Expanded on Early Buddhist thought about nature of conditioned reality, empirical personality.
Adopted Pali as language
Vibhajjavāda
No separate school - sometimes referred to Theravadins
Mahisāsaka
Theravada > Mahisāsaka > Sarvastivada
Started with Elder Purana's disagreement with First Buddhist Council and exclusion of 7(8) rules regarding food.
Sarvāstivāda (eventually centered in India)
Called/hosted Fourth Buddhist Council
Changed to Vaibhāshika based on the Sarvastivadin Canon, Vibhasha
Adopted Sanskrit as language
Three Pitakas (similar to Theravada)
Theory of Sarvamasti pushed very close to eternalism - doesn't jive with Buddha's teachings