stock broker is someone who buys and sells stocks on
the behalf of others for a predetermined commission.
The stock broker basically works as an agent coordinating
the activities of the buyers and sellers on the stock
Along with the trading of stocks, many stock brokers indulge in giving advice to the clients as to which stocks, mutual funds, debentures etc. to buy or sell.
The history of stock brokers can be traced back to
the origins of the first stock exchange in 1602 at
Amsterdam. Even before that brokers are said to have
existed in France dealing with government securities.
The Amsterdam Stock Exchange was involved in buying
and selling of shares for the Dutch East India Company.
There isn't really a division in the types of stock brokers. One can only differentiate between solo brokers and corporations. The solo brokers are normally more helpful in the advice department and give you the personal touch that many major corporations lack. Apart from this there is hardly any other difference; one can only enlist the services they provide: