Popular branches include raja, kriya & hatha
Each branch with its unique characteristics... [DOC] [TLE] Six Yoga Systems: Hatha, Raja, Bhakti, Jnana, Kriya, Karma [PAR] Definitions and resources for the 6 major Yogic Systems: Hatha, Raja, Bhakti, ... a 
copy handy that also includes pictures of the various asanas and mudras.