USB Universal Serial Bus - Digital Electronics Corporation Compatible Computer Devices

Description extracted from Wikipedia:

Multiple image |header = Digital electronics |direction = vertical | image1 = Imagen 4.png | caption1 = A digital signal has two or more distinguishable waveforms, in this example, high voltage and low voltages, each of which can be mapped onto a digit. | image3 = HitachiJ100A.jpg | caption3 = An industrial digital controller Digital electronics is a field of electronics involving the study of digital signals and the engineering of devices that use or produce them. This is in contrast to analog electronics and analog signals. Digital electronic circuits are usually made from large assemblies of logic gates, often packaged in integrated circuits. Complex devices may have simple electronic representations of Boolean logic functions.