Patanjali Maharshi gathered the techniques of Raja Yoga, systematized, and codified them into the branch called Ashtanga Yoga – The Eight Steps or Parts.
These Steps are:
Yama Universal Values / Order
Niyama Individual Discipline
Asana Physical Poses
Pranayama Regulation of Prana
Pratyahara Internalizing or Inward Sensing
Dharana Disciplining or moderating the Intellect
Dhyana Silencing
Samadhi Expansion of Awareness