SCADA Supervisory Control and Data Acquisition : what is scada, real-time system, remote control, communications, radio, simplex or duplex, remote terminal units, master terminal units, sensors, actuators and wiring, applications, operator interface, scada economics, protocol detailed, analog control pulse control, serial control, monitor analog signals, monitor serial signals, turn-on time, satellite communication, cell phones, modems, long distance communications is serial, analog-to-digital conversion, determining scan interval, a limited two-way system.