Types of Members ?

On F & O segment on NSE
Trading member – One who trades on his own and on behalf of his clients. Net worth – Rs 1.00 crores. Deposit Rs 8 lakhs.
Clearing and Trading member – One who acts like a trading member and in addition, is a clearing member, who clears his own trade as well as for other trading members. Net Worth – Rs 3.00 crores. Deposit Rs 25 lakhs.
Professional Clearing member - One who acts only as a clearing member for other trading members. Typically they are banks and institutions.