Word

Ashtadashavidhyasthanani

Sanskrit

अष्टादशविद्यास्थानानि

In General

18 sources of knowledge. Vishnu Purana (3.6. 28-29) list the ancient Indian texts in the following heads. Four Vedas, six Vedangas, Four Upangas and four Upavedas.

Four Vedas: Rigveda Yajurveda Samave da Athervaveda

Six Vedangas: Siksha (phonetics), Vyakarana (grammer and linguistics), Chandas (prosody), Niruktha Etymology), Jyotisha (Astrology and Astronomy) and Kalpa (rituals and its practices)

Four Upangas: Nyaya, Mimamsa, Itihasa-Purana, and Dharmasasthra

Four Upavedas: Ayurveda, Dhanurveda, Gandharvaveda, Sthapatyaveda/Arthasasthra