Its shape may stand for devotion to a certain main god: a 'U' shape stands for Vishnu, a group of three lines for Shiva.
It is not uncommon for some to meld both together in an marker signifying Hari-Hara (Vishnu-Shiva indissoluble).
Concept of Hinduism have been around since before history was written down.
One group accepts god, another does not believe in god. The Indian constitution says that, by law, Hinduism takes ideas from the Vedas, the Upanishads, as well as the teachings of many Hindu gurus through the ages.
Many different types of thought come from six main Vedic/Hindu schools.
is the world's third largest religion, after Christianity and Islam.
However, it is not a religion of the same kind as the other two main religions.