A sutra (IAST: sutra ) is a Sanskrit word that means "string, thread". In Indian literary traditions, it also refers to an aphorism or a collection of aphorisms in the form of a manual or, more broadly, a condensed manual or text. Sutras are a genre of ancient and medieval Indian texts found in Hinduism, Buddhism and Jainism.

SUTRA, abbreviation for Scomi Urban Transit Rail Application, is a monorail electrical multiple unit (EMU) type train system designed by Malaysian rail company Scomi Rail. The design is currently the main product offering of Scomi Rail, which has won several contracts with the design, with the first customer being the Mumbai Monorail project.