God in Hinduism

Hindus believe in one main God, Brahman. Most Hindus believe he is present in every person as the eternal spirit or soul, called the atman. 
For Hindus there is a sacred symbol that represents their belief. Om (or Aum) is the sound to represent their God.
There is a Trimurti in the Hindu belief: Brahma the Creator, Vishnu the preserver and Shiva the destroyer.
Hindus also believe that sometimes God may appear on earth in living form.