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Basic Concepts in Information Technology

Basic Concepts in Information Technology. Chapter 1. The Computer System. The computer system consists of: Hardware: Physical Components Software: set of instructions that tell the computer what to do and how to do it. Users: people who use the software and hardware to do something .

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Basic Concepts in Information Technology

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  1. Basic Concepts in Information Technology Chapter 1

  2. The Computer System • The computer system consists of: • Hardware: Physical Components • Software: set of instructions that tell the computer what to do and how to do it. • Users: people who use the software and hardware to do something.

  3. Information Technology • The set of tools used to: receive, process, store, retrieve, print, and transmit information in an electronic form. • Information can be: text, sound, picture, or video

  4. Types of Computers • Computers vary in performance and cost, in size and capabilities • Therefore, there are many types of computers that are used for different purposes.

  5. Super Computers • Very high-speed • Used in large scientific and research labs. • Very expensive (millions of dollars)

  6. Mainframes • Room-sized, expensive, high-speed, very powerful with large storage. • Connected to many terminals (dumb and intelligent)

  7. Mini Computers • Same as the mainframe but smaller in size • Used instead of Personal computers when they are not adequate, and mainframes are expensive.

  8. Personal Computers • The most popular, and not very expensive. • The software that is compatible with the PC depends on the manufacturer of this PC.

  9. Laptops • Portable and Briefcase sized • As powerful as a PC but more expensive

  10. Palmtop Computers • Portable Hand-held computers. • Does very simple functions, and relatively cheap. • Also called “Notepad”.

  11. Parts of the Computer • System Unit: the box that contains the CPU, Main Memory Drives, and power Supply. • Input Devices: Devices that allow the user to enter data into the computer • Output Devices: Devices that translate information after being processed into a form the user can understand. • Peripherals: any hardware that is connected to a computer

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