The Four Types of Yoga
Theologically speaking, there are four divisions of Yoga, that form one of the cornerstones of Hinduism. In Sanskrit, they are called Raja-Yoga, Karma-Yoga, Bhakti-Yoga and Jnana-Yoga. And the person who seeks this kind of a union is called a 'Yogi':

1. Karma-Yoga: The worker is called the Karma-Yogi.

2. Raja-Yoga: One who seeks this union through mysticism is called a Raja-Yogi.

3. Bhakti-Yoga: One who searches this union in love is a Bhakti-Yogi.

4. Jnana-Yoga: One who seeks this Yoga through philosophy is called the Jnana-Yogi.