Indian philosophy has had many schools. These are known as darshanas (viewpoints). There are various classifications of the schools. But they all appear somewhat arbitrary. The schools include:
- Samkhya (enumeration)
- Nyaya (logic)
- Vaishesika (atomism or pluralism)
- Purva Mimamsa (prior Vedic exegesis)
- Uttara Mimamsa (later Vedic exegesis), also known as Vedanta
- Bauddha (Buddhism)
- Jaina (Jainism)
- Charvaka (Materialism)
Historically, the Yoga and Samkhya schools influenced each other and can be seen to merge into one school. Similarly, the Nyaya and the Vaishesika schools influenced each other. The same goes for the Purva and Uttara Mimamsa schools.
Among these nine schools, Yoga and Vedanta accept the existence of an Ishvara (Deity). The others are ambivalent about the subject or explicitly deny such an existence.