Input Output Devices

Input and Output (I/O) Devices in Computers: A Beginner's Guide

Computers communicate with the outside world using input and output devices. These devices either send data to the computer (input) or receive data from the computer (output). Let’s explore these devices in simple terms.

Input Devices

Input devices allow you to give information or instructions to the computer. Common examples include:

  1. Keyboard

    • The most basic input device used to type text, numbers, and symbols.
    • Examples of keys: alphabets (A-Z), numbers (0-9), and special keys (Enter, Shift, Spacebar).

  2. Mouse

    • A pointing device used to interact with the graphical user interface (GUI).
    • Actions: clicking, dragging, and scrolling.

  3. Microphone

    • Captures audio and sends it to the computer.
    • Used for voice commands, video calls, and recording sound.

  4. Scanner

    • Converts physical documents or images into digital format.
    • Types: Flatbed scanners, handheld scanners.

  5. Webcam

    • Captures live video and images.
    • Used for video conferencing, online classes, and streaming.

  6. Touchscreen

    • A display that also acts as an input device by detecting touch.
    • Common in smartphones, tablets, and some laptops.

  7. Joystick and Game Controller

    • Used for gaming, controlling movements, or simulations.

  8. Stylus

    • A pen-like device for drawing or writing on a touchscreen.


Dell Wireless Key board + mouse combo 1400Rs




JBL USB Microphone 1000Rs


Canon Scanner USB 6000Rs


Logitech Digital HD Webcam 2000Rs

Acer Full Screen Touch HD Monitor 21.5 inch 20000Rs


Zebronics Gamepad 1300Rs


Dyazo Stylus 250 Rs

Output Devices

Output devices display or present the results of computer processing. Examples include:

  1. Monitor

    • A screen that displays text, images, and videos.
    • Types: LCD, LED, and OLED monitors.

  2. Printer

    • Converts digital documents into physical copies.
    • Types:
      • Inkjet Printers: Great for photos.
      • Laser Printers: Fast and efficient for documents.

  3. Speakers

    • Produce sound output like music, notifications, or alerts.

  4. Headphones/Earphones

    • Provide private sound output directly to the user.

  5. Projector

    • Displays images or videos onto a large surface, like a wall or screen.
    • Used in classrooms and presentations.

  6. Plotter

    • Used for printing large-scale graphics, like maps and architectural designs.


Dell FHD 22" LED Monitor 6800Rs


HP Laser Jet Monochrome Printer 12000Rs



HP Inkjet Color Printer 5800Rs


Zebronics Speaker 2.0 370 Rs


Zebronics Premium Wired Headphone 700Rs


Epson EB-E01 XGA Projector 31,500Rs



Large Size CNC Pen Plotter

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