Since 1976, most of the orders in NYSE had been transmitting electronically to specialists screens over the DOT or via the upgraded SuperDot.
[1] In 2009, SuperDOT was replaced by the new NYSE Super Display Book system (SDBK) for processing orders.
[3] The user, either an investor or a broker, used to enter the order into the system, which immediately reached the specialist to be executed.
The users received a confirmation report of the transaction in real time, once the order was executed.
However, they indirectly utilized the system through software or online services offered by brokerages that in turn placed the client orders into the SuperDot.