1. Any information or data that is sent to a computer for processing is considered input. Input or user input is most often sent to the computer using an input device The picture is an example of input being sent from the computer keyboard to the computer.
Devices commonly used to provide input to a computer include:
Computer software can receive data in the form of an input stream, which is a flowing sequence of data that can be directed to specific functions. The directed channel in which the data stream flows is known as a pipeline, and changing its direction is known as piping.
2. In general, input can also refer to a contribution of feedback, information, or work. For example, someone may ask you for your input about a project they have undertaken at work or school.