Om - This is a Hindu symbol and it represents the three gods Brahma, Vishnu and Maheswara. It is also the meditation symbol. It will increase breathing capacity and clean the respiratory system. If it is chanted in a particular manner, it will increase the concentration and leads to good health.
Unalome & lotus. Enlightenment. The Unalome is originally a hindu symbol that graphically recalls Shiva´s third eye and it represents wisdom and the path to perfection. Full description and hi-res here: http://www.tattootribes.com/index.php?newlang=English&idinfo=7591
The symbol known as the Sri Yantra is an ancient Hindu symbol comprised of nine triangles that are interlaced in such a way as to form 43 smaller triangles in a web said to be symbolic of the entire cosmos. The 64 tetrahedron grid is also the foundational seed geometry of the fabric of the vacuum according to Nassim Haramein's Unified Field Theory. Everything is connected by the structure of space.