五部

The five classes, or groups

I.

The 四諦 four truths, which four are classified as 見道 or theory, and 修道 practice, e. g. the eightfold path.

II.

The five early Hīnayāna sects, see 一切有部 or Sarvastivadah.

III.

The five groups of the Vajradhātu maṇḍala.