What is Maharishi Patanjali's Ashtanga Yoga?

Maharishi Patanjali's Ashtanga Yoga (8 Limbs of Yoga):

• External Limbs (Bahiranga): Yama (Ethical restraints), Niyama (Self-discipline), Asana (Posture), Pranayama (Breath control), Pratyahara (Withdrawal of senses).
• Internal Limbs (Antaranga): Dharana (Concentration), Dhyana (Meditation), Samadhi (Absorption/Enlightenment).
• Goal: Cessation of fluctuations of mind (Citta Vritti Nirodha) leading to Kaivalya (liberation).