Data acquisition systems

Their common function is to covert analogic signals like light, temperatures, speed, etc. into digital signals for the computer.
DAQ systems employ high-quality sensors that give accurate readings with minimal or no noise.
The electrical signals impending from the sensors cannot be utilized directly, as it needs modification.

A data acquisition system is a collection of software and hardware that allows one to measure or control the physical characteristics of something in the real world.
A complete data acquisition system consists of DAQ hardware, sensors and actuators, signal conditioning hardware, and a computer running DAQ software.