Computer Hardware Overview

📘 Computer Fundamentals 👁 54 views 📅 Nov 05, 2025

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Hardware includes all physical parts of a computer system...

Computer Hardware Overview

Computer hardware consists of physical components of a computer that can be touched and seen. It works together to input, process, store, and output data.

1. Central Processing Unit (CPU)

Known as the brain of the computer.
Performs arithmetic, logic, and control operations.
Main components:
- ALU (Arithmetic Logic Unit): Performs calculations and logical operations.
- CU (Control Unit): Directs data flow between components.
- Registers: Temporary storage for quick data access.

2. Memory

Stores data and instructions for processing.
Types:
- RAM (Random Access Memory): Temporary memory for running programs.
- ROM (Read-Only Memory): Permanent memory storing essential instructions.
- Cache: High-speed memory for frequently used data.
- Secondary storage: Hard drives, SSDs, optical discs.

3. Input Devices

Devices that allow users to enter data.
Examples: Keyboard, Mouse, Scanner, Microphone, Touchscreen.

4. Output Devices

Devices that display or produce processed results.
Examples: Monitor, Printer, Speakers, Projector.

5. Storage Devices

Long-term storage for data and programs.
Examples: HDD, SSD, USB drives, Optical discs, Magnetic tapes.

6. Motherboard

Main circuit board connecting CPU, memory, and peripherals.
Facilitates communication between all hardware components.

7. Power Supply Unit (PSU)

Converts AC electricity to DC for computer components.
Provides stable and regulated power.

8. Peripheral Devices

External devices connected to the computer for additional functionality.
Examples: Printers, External drives, Scanners, Webcams.

Key Points

Hardware is the physical part of a computer; software is the instructions that run on it.
Essential hardware includes CPU, memory, input/output devices, and storage.
Proper hardware selection affects computer performance, speed, and capability.