Five major sciences

The five major sciences (Skt. Pañcavidyāsthāna ; Tib. rigné chenpo nga; Wyl. rig gnas chen po lnga) are part of the ten sciences or traditional fields of knowledge in which a learned person is supposed to be well versed. They are:

1. craftsmanship (Skt. śilpa; Wyl. bzo rig pa)
2. logic (hetu; gtan tshigs)
3. grammar (śabda; sgra)
4. medicine (cikitsā; gso ba)
5. 'Inner science' or Dharma (nang don rig pa)

Source

RigpaWiki:Five major sciences