Definition and Purpose

Components of a Computer System

• Hardware: The physical parts of a computer, including the Central Processing Unit (CPU), memory (RAM), storage devices (hard drives, SSDs), input devices (keyboard, mouse), output devices (monitor, printer), and supporting components like motherboards, buses, and cooling systems.

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• Software: Programs and instructions that direct the hardware to perform specific tasks. This includes system software (operating systems) and application software (programs for user tasks),.

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Central Processing Unit (CPU)

Memory and Storage

• RAM (Random Access Memory): Temporary memory used for active processes and data.
• Storage devices: Permanent storage for programs and data, such as hard drives or SSDs.

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Input and Output Devices

• Input devices: Allow users to provide data to the computer (e.g., keyboard, mouse, scanner).
• Output devices: Present processed data to users (e.g., monitor, printer, speakers),.

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System Architecture

Functions of a Computer System

1. Data Input: Accepting raw data from users or other systems.
2. Data Processing: Performing calculations, comparisons, and logical operations.
3. Data Storage: Saving data for immediate or future use.
4. Data Output: Presenting processed information in a usable form.
5. Control: Coordinating all operations through the CPU and software.

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Types of Computer Systems

• Supercomputers: Extremely fast, used for complex scientific calculations.
• Mainframes: Large systems for enterprise-level processing.
• Personal computers (PCs): Desktops and laptops for individual use.
• Mobile devices: Tablets and smartphones.

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Characteristics

Applications