शास्त्र {IAST|Śāstra} is Sanskrit for rules in a general sense. The word is generally used as a suffix in the context of technical or specialized knowledge in a defined area of practice; e.g. Bhautika Shastra (physics), Rasayana Shastra (chemistry), Jeeva Shastra (biology), Vastu Shastra (architectural science), Shilpa Shastra (sci... Found on http://en.wikipedia.org/wiki/Shastra
(from the article `Hinduism`) ...of these texts are the sutras of Gautama, Baudhayana, and Apastamba. Although the direct relationship is not clear, the contents of these works ... Found on http://www.britannica.com/eb/a-z/s/77