What are the three components of parliament?

The three components of Parliament as envisaged in the Indian Constitution are as follows:

1. President
2. The Council of States (Rajya Sabha)
3. The House of the People (Lok Sabha)

The President of India is not a member of either House of Parliament and does not sit in the Parliament to attend its meetings. But he is an integral part of the Parliament. 

Further Reading:

• President of India – Article 52-62
• Lok Sabha
• Rajya Sabha 

To read more about the Functions of Parliament in India, check the linked article.