An Analog to Digital (ADC) is an electronic device that performs the opposite process of a DAC. It converts an analog signal, which is continuous and uninterrupted, into a digital format, which is made up of binary numbers. This is important for digitizing sounds, images, or other analog data, allowing it to be processed, stored, and transmitted using digital technologies. ADCs are found in devices such as cameras, microphones, sensors, or any device that needs to capture and process analog signals.