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What is a Computer?

• A computer accepts input, processes data, stores data, and produces output, all according to pre-programmed instructions.
• A user interacts with the computer or uses the information it provides.
• Advantages include speed and consistency.
• Disadvantages include reliability and storage issues.
• Violation of privacy and impact on the workforce are also concerns.
• Health risks are also an aspect to consider.

Information Processing Cycle

• Data is unprocessed text, numbers, images, audio, and video.
• Information is processed data that is meaningful to users.
• A computer takes input data, processes it, then displays output information.

Information as Data

• Information includes various types: home videos, business transactions, news, calls, financial data, and more.

Methods for Conveying Information

• Computers convey information through various formats like text, sound, numbers, and images.

Components of Computers

• Hardware: Physical components of a computer system.
• Software: Instructions to the computer, guiding how it functions.

Categories of Computers

• Supercomputers: High-performance, expensive computers used for complex scientific and industrial calculations.
• Mainframes: Large computers capable of handling many users simultaneously (timesharing).
• Servers: Control access to resources on a network.
• Personal Computers (PCs): Standalone computers for personal or business use.
• Mobile Computers and Mobile Devices: Portable computers and hand-held devices.
• Game Consoles: Devices designed for playing games.
• Embedded Computers: Special purpose computers integrated into other products, designed for specific tasks.

Servers

• Control access to resources on a network.
• Centralize the storage of programs, data, and information.
• Can support many users simultaneously.
• Terminals, PCs are used with a server for accessing information on it.

Personal Computers

• Perform all tasks (input, processing, output, and storage) on their own.
• Two types: Notebook computers and Desktop computers.

Mobile Computers and Mobile Devices

• Portable.
• Smaller devices than PCs.
• Programs and data stored on memory cards or small media.
• Can connect to a PC or the internet.

Game Consoles

• Used specifically for single or multiplayer games.
• Have input devices like handheld controllers.
• Output happens on a TV screen.