This term was coined by Honeywell, USA in 1985. The first generation of instruments like flow meters were mechanical devices. The next generation used electronics for improving performance. With electronics, adjustment of range, span, zero adjustment etc. could be carried out with potentiometers. (i.e. ease of setting parameters was achieved) In some cases functions like linearization, annunciation (exceeding process limits) etc. were also integrated. With the help of 4-20mA transmitter, data transmission over longer distance was made easy. There was a considerable jump in technology in terms of improved accuracy, response, interface with operator, ease of adjustment of range and span. This was made possible with use of digital circuits, microcontrollers, ADC, DAC. Today we hear about not only Smart Transmitter/Instruments, but Smart Control Valves, Smart Machines like Microwave Ovens, Washing Machines etc. Digital Oscilloscope also can be categorized as Smart Oscilloscope. Most...