2. Input

An ‘input’ is anything that that the computer needs in order to do some work.  For example there are many input devices available such as

• Keyboard
• Mouse
• Touch sensitive screen as on a tablet or smart phone

All of these devices send data into the computer for processing.

If data is already available in the computer, for example loaded from a file stored on hard disk, then the computer can process that directly as well.

This kind of data is also classed as an input.

So - Input is data that is ready to be processed.

All data within the computer is in binary form – binary 0 and binary 1.