What does I/O stand for?

I/O stands for Input/Output, which refers to the communication between an information processing system and the outside world. In the context of computing and data processing, "Input" encompasses any data or signals received by a system, while "Output" pertains to the data or signals sent from the system to the user or another device. This concept is fundamental in understanding how systems interact with hardware (like keyboards and monitors) or communicate over networks. The terminology is widely used in various technology fields, such as computer science, programming, and networking, reflecting its importance in the functionality and usability of different systems.