What is yoga?

Today I am feeling bored. To get out of boredum, I am writing about yoga, i.e. YOG.
In our very old culture,there are 4 Vedas, 18 Puranas. Same way there are 6 Darshanas, namely 1. Vaisheshika 2. Nyaya 3. Sankhya 4. Yoga 5. Mimansa 6. Vedanta.
So, Yoga is one of the Darshanas.
Mahrshi Pantanjali is known to be Originator of Yogdarshan. He has writen "Yogdarshan" which contains 4 parts. Each part consists of 50 to 55 sutras. So, there are total 195 Sutras. Each sutra is one line long only! It is writen in Sanskrit. Maharshi Patanjali was also master of Grammer. So, each sutra has got treamendeous meaning. There are hundreds of translations of Yogdarshana available in the market. These sutras are very logical, carefully writen as todays scientists write. Each new word in a sutra and there is specific definition in the same in the next sutra. In this Yogdarshana, Ashtang yog i.e. 8 Fold Yoga ,has been mentioned by Maharishi. These are:- 1. Yama 2. Niyama 3. Asana 4. Pranayama. 5. Pratyahara 6. Dharana 7. Dhyana & 8. Samadhi. We shall each each of the parts in detail later on. By friends.