The sources for mathematical computing in India in the early phase are the Vedic books including the Brahmana texts, the Sulbasutras (texts on altar geometry), Jyotisha (astronomy), the Chandahsastra (Pingala's book on prosody), Panini's grammar, the Natya Sastra (Bharata Muni's text on music, drama, and dance), and nonmathematical texts such as the Mahabharata and diverse sastras (scientific and philosophical texts).