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Applications of ICT
Parts of Computers
Computer Parts Explained

Essential Parts of a Computer

📝 Cheat Sheet

Essential Parts of a Computer

A computer is made of parts that each do a specific job. There are 6 main groups of components:

  1. CPU (Central Processing Unit): the brain of the computer; processes all instructions.
  2. GPU (Graphics Processing Unit): handles visual data for games and videos.
  3. Motherboard: connects all components to each other.
  4. RAM (Random Access Memory): temporary storage for active tasks; lost when power is off.
  5. HDD/SSD: long-term storage for files and programs.
  6. Input devices: keyboard, mouse, microphone; used to enter data.
  7. Output devices: monitor, speakers, printer; used to display or present information.
  8. PSU (Power Supply Unit): provides electricity to all components.
  9. NIC (Network Interface Card): allows a wired internet connection.
  10. Wi-Fi Adapter: allows a wireless internet connection.

Touchscreens are both input and output devices.

A computer has many parts that work together. This guide puts those parts into simple groups so you can see how a computer works.

Processing Components

These parts handle the computer’s main operations:

  1. Central Processing Unit (CPU): The “brain” of the computer.
  2. Graphics Processing Unit (GPU): Handles visual data for games and videos.
  3. Motherboard: Connects all parts of the computer.
❓ Pop Quiz
A student opens a word processor, plays music, and downloads a file at the same time. Which component makes this multitasking possible?

Memory and Storage

These components store data:

  1. Random Access Memory (RAM): Temporary storage for active tasks.

  2. Hard Drive (HDD) or Solid State Drive (SSD): Long-term storage for files and programs.

  3. Removable Storage: Portable devices for data transfer and backup:

    • USB flash drives
    • External hard drives
    • Memory cards

  4. Optical Storage: Reads and sometimes writes to CDs, DVDs, or Blu-ray discs.

Input Devices

These allow users to interact with the computer:

  1. Keyboard: For typing text and commands.
  2. Mouse: For navigating the screen.
  3. Microphone: For audio input.
Flashcard
What is the difference between an input device and an output device?
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Answer

Input devices send data INTO the computer. Output devices send information OUT of the computer.

  • Input examples: keyboard, mouse, microphone
  • Output examples: monitor, speakers, printer

A touchscreen is both: it receives touch (input) and displays content (output).

Output Devices

These display or present information from the computer:

  1. Monitor: Displays visual information.
  2. Speakers: Produce sound.
  3. Printer: Creates physical copies of documents.
Some devices, like touchscreens, serve as both input and output devices.

Power and Cooling Systems

These keep the computer running and prevent overheating:

  1. Power Supply Unit (PSU): Provides electricity to all components.
  2. Heat Sink: Absorbs and releases heat from the CPU.
  3. Fans: Help move air to cool components.
Flashcard
What is the role of the Motherboard?
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Answer

The Motherboard connects all components to each other.

It is the main circuit board inside a computer.

Every other part - CPU, RAM, storage, power - connects through it.

Connectivity Components

These allow the computer to connect to networks and other devices:

  1. Network Interface Card (NIC): Allows a wired internet connection.
  2. Wi-Fi Adapter: Allows a wireless internet connection.
  3. Bluetooth Adapter: Connects wirelessly to other devices.
  4. USB Ports: Connect various external devices.
USB ports are used for both data transfer and charging devices.
Last updated on • Talha
Parts of ComputersInput/Output Devices