Final answer:
The ADC in ESIS gets its information from the pitot system known as an Air Data Computer (ADC).
Step-by-step explanation:
The ADC in the ESIS (Engine Sensor Indicating System) gets its information from the pitot system known as an Air Data Computer (ADC).
A pitot system consists of a pitot tube, which is a probe that measures the static pressure and the total pressure of the air flowing around it.
The ADC uses these pressure measurements to calculate various air data parameters such as airspeed, altitude, and Mach number.