The Scriptures :
1. The Srutis : g)-2
g ).The Vedangas-2.
Vyakarana is Sanskrit grammar. Panini’s books are most famous. Without knowledge of Vyakarana, you cannot understand the Vedas.
Chhandas is metre dealing with prosody.
Nirukta is philology or etymology.
Jyotisha is astronomy and astrology. It deals with the movements of the heavenly bodies, planets, etc., and their influence in human affairs.
Kalpa is the method of ritual.
The Srauta Sutras which explain the ritual of sacrifices belong to Kalpa.
The sulba Sutras, which treat of the measurements which are necessary for laying out the sacrificial areas, also belong to Kalpa.
The Grihya Sutras which concern domestic life, and the Dharma Sutras which deal with ethics, customs and laws, also belong to Kalpa.
To be continued ....