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'''Six classes of tantra''' ([Tib. རྒྱུད་སྡེ་དྲུག, ''gyüdé druk'', [[Wyl.]] ''rgyud sde drug'') — in the [[Nyingma]] school of [[Tibetan Buddhism]], the [[tantra]]s are divided into six classes: 

*the [[three outer classes of tantra]] (which are common to both the [[Sarma]] and Nyingma schools):
:1. the [[kriya tantra]],
:2. the [[charya tantra]] and 
:3. the [[yoga tantra]].
and
*the [[three inner tantras|three inner classes of tantra]] (which are specific to the Nyingma school):
:4. the [[Mahayoga]] tantras,
:5. the [[Anuyoga]] tantras and
:6. the [[Atiyoga]] tantras. 

==Internal Links==
*The [[four classes of tantra]] of the Sarma schools

==Further Reading==
*[[Tulku Thondup]], ''The Practice of Dzogchen'' (Ithaca: Snow Lion, 1989), pages 10-46. 

[[Category:Tantras]]
[[Category:Nyingma]]
[[Category:Enumerations]]
[[Category:06-Six]]