Aum (also Om, written in Devanagari as ?, in Chinese as ?, in Tibetan as ?, in Sanskrit known as pra?ava ????? lit. "to sound out loudly" or o?k?ra ????? lit. "o? syllable") is a mystical or sacred syllable in the Indian religions, including Hinduism, Sikhism, Jainism, and Buddhism. http://en.wikipedia.org/wiki/Om
