A tower commonly constructed a short distance upstream from a dam and within the reservoir to control flow of water from the reservoir into the conduits and tunnels.

A tower from which air traffic controllers direct planes in the air and on the ground.

Bespoke packages of information services used to manage and control supply chain activities on behalf of customers and suppliers. Also known as Logistics Control Tower (LCT)

A glassed-in observation tower on the airport from which control tower operators observe and direct airport air and ground traffic.

A structure with facilities for the control of airport traffic, including the movement of aircraft, vehicles and pedestrians on maneuvering as well as aircraft in flight.

A control tower (ATCT) is the name of the air traffic control unit responsible for movements around an airport, and is also the name of the building from which the unit operates. Most of the world's airports are non-towered or mandatory frequency — only a small minority of the busiest airports have enough traffic to justify a control tower, though some airports may open temporary tower units during special events like the Oshkosh Airshow.