The four types of LOTO (Lockout/Tagout) include individual lockout, group lockout, tagout, and tryout. Individual lockout involves the use of a personal lock and tag by an individual worker to isolate energy sources. Group lockout involves the use of a single lock and tag by a team of workers who are working together on a machine or equipment. Tagout involves the use of a tag to indicate that a machine or equipment is not to be operated. Tryout involves the process of testing the equipment after it has been locked out to ensure that all energy sources have been effectively isolated. Proper implementation of LOTO is crucial in preventing accidents and injuries caused by unexpected energization or release of stored energy.