What is a computer?
How does a computer work?
User inputs data using the input devices -> Processor process the data as per the user's instruction -> Then displays the output as requested, like the diagram below:
Computer input and output components:
Input & Output Devices
Input devices and output devices are computer hardware that enables a computer user to interact with the computer. Without input devices, a computer user would not be able to feed instructions to, or send and store information in, a computer; without output devices, the computer would not be able to present processed information back to the user.
Storage Devices
A storage device is a piece of hardware that is primarily used for storing data. Every desktop computer, laptop, tablet, and the smartphone will have some kind of built-in storage device within it, and you can also get separate, external storage drives that can be used across multiple devices.
Here are some examples of standard input, output, and storage devices:
Input Devices
Keyboard, mouse, scanner, joystick, touch screen, light pen, microphone, etc.
Output Devices
Monitor, printer, plotter, projector, speakers, etc.
Storage Devices
Hard Disk Drive (HDD), Solid State Drive, Random Access Memory (RAM), CD, DVD, and Blu-ray Discs, DVD-RAM, ROM, USB Flash Memory, etc.