Vedāṅgas

The Vedanga (vedāṅga, "limbs of the Veda") are six auxiliary disciplines traditionally associated with the study and understanding of the Vedas.

    Shiksha (śikṣā): phonetics, phonology and morphophonology (sandhi)
    Kalpa (kalpa): ritual
    Vyakarana (vyākaraṇa): grammar
    Nirukta (nirukta): etymology
    Chandas (chandas): meter
    Jyotisha (jyotiṣa): astronomy

Traditionally, vyakarana and nirukta are common to all four vedas, whilst each veda has its own shiksha, chandas, kalpa and jyotisha texts.

Source

www.wisdomlib.org