<human>:  How many different types of Buddhism are there?
<bot>: There are several different types of Buddhism, but the most common are Mahayana and Theravada. Mahayana Buddhism is the largest Buddhist school, and is often referred to as the “big-B” school. Mahayana Buddhism is the most popular form of Buddhism in the world today. It is based on the teachings of the Buddha, and is characterized by the belief that enlightenment can be achieved through meditation, study, and other practices.