Who is Broker??? You should know! ! !

A broker is a party that mediates between a buyer as well as a seller. A broker who also acts as a seller or as a buyer becomes a principal party to the deal. Distinguish agent: one who acts on behalf of a principal. A "brokerage" or a "brokerage firm" is a business that acts as a broker. A brokerage firm is a business that specializes in trading stocks.[1] A salesperson working for a securities or commodity brokerage firm is popularly (but incorrectly) called a "broker." A broker in that context is, strictly speaking, an exchange member who's actually executing the purchase or sales order in the 'pit', on the exchange, as a service to the client of the firm for which that salesman works.

See Some Types of brokers
Aircraft broker
Broker-dealer
Business broker
Commodity broker
Contract Hire Broker (see Business Contract Hire)
Deep discount broker
Forex Broker
Insurance broker
Investment broker
IT broker
Joint venture broker
List broker
Low cost broker
Marriage broker
Mortgage broker
Options broker
Power broker (term)
Prime broker
Real estate broker
Retail broker
Ship broker
Sponsorship broker
Stock broker
Yacht charter brokers