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WHAT is a Computer?

WHAT is a Computer?. A Computer is a machine that manipulates information or "data." Type documents, send email, and surf the Internet. Spreadsheets, accounting, database management, presentations, games, and desktop publishing. Parts of Computer.

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WHAT is a Computer?

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  1. WHAT is a Computer? • A Computer is a machine that manipulates information or "data." • Type documents, send email, and surf the Internet. • Spreadsheets, accounting, database management, presentations, games, and desktop publishing. Introduction To Information Technology

  2. Parts of Computer • The computer case is the metal and plastic box that contains the main components of the computer. • Computer cases come in different shapes and sizes. • A desktopcaselies flat on a desk, and the monitor usually sits on top of it. • A tower case, is tall and sits next to the monitor or on the floor. Introduction To Information Technology

  3. Parts of a Computer • Central Processing Unit (CPU) • The brain of a computer • Oversees everything that a computer does. Introduction To Information Technology

  4. Parts of a Computer • Motherboard • Main circuit board that all other internal components connect to (CPU and memory are usually on it) Introduction To Information Technology

  5. Motherboard Expansion Slots Intel Chipset RAM Slots Introduction To Information Technology

  6. Storage • Two Types of storage: Primary Secondary Primary Storage : RAM Secondary Storage : Hard Disk Removable Disk Floppy Disk CD / DVD Introduction To Information Technology

  7. Parts of a Computer • Memory • Very fast storage media to save data. Introduction To Information Technology

  8. Memory • Several Types: • Random Access Memory – Temporary stores info • Read Only Memory – Permanent type of storage (CD-ROM) • Basic Input Output System (BIOS) – Type of ROM that establishes a communication when the computer is first turned on. Introduction To Information Technology

  9. Memory BIOS ROM RAM Introduction To Information Technology

  10. Parts of a Computer • Hard Disk • Large-capacity permanent storage • Holds information like programs and documents Introduction To Information Technology

  11. Hard Disk Introduction To Information Technology

  12. Parts of a Computer • Expansion Slots • Sockets built into the motherboard • Allow for expanded capabilities and components to be installed • Examples include: • Video cards • Sound cards • Modems Introduction To Information Technology

  13. Expansion Slots Internal Modem Sound Card Video Card Introduction To Information Technology

  14. Parts of a Computer • The monitor, which resembles a television, is where the computer displays text and pictures. • The keyboard lets you type information into the computer. It resembles a typewriter keyboard. Introduction To Information Technology

  15. Parts of a Computer • The mouse is the hand-held device that lets you point, click, and move objects on the monitor screen. • Have a ball underneath which allows you to easily move it on a flat surface. • Has two or three buttons used to move a cursor around the screen Introduction To Information Technology

  16. Parts of a Computer • A trackball,touchpad, and touch screen are alternatives to the mouse • A trackball is similar to a mouse, but the ball that helps maneuver the cursor is on top instead of underneath. • When using a touchpad or touch screen, you can use your finger or a tool called a stylusto move around thescreen. Introduction To Information Technology

  17. Parts of a Computer • The printer is a machine that prints a paper copy of what you see on the monitor. Introduction To Information Technology

  18. INPUT DEVICES • There are few types of Input Devices • Keyboards, • Scanners, • Joysticks • Digital cameras • Microphone • Mouse Introduction To Information Technology

  19. SCANNER • Allows you to copy an image into your computer. • 3 main types : • Hand-held scanners work like scanning guns used at department stores. • Flatbed scanners look like a printer and can scan only loose, single pages. • Sheet-fed scanners look and act like a copy machine. Introduction To Information Technology

  20. Scanners Handheld Scanner Flat Bed Scanner Sheet fed Scanner Introduction To Information Technology

  21. MICROPHONES AND JOYSTCKS • Microphone = Connect the microphone to the computer and use the computer to record sound. • Joystick = A lever used while playing a computer game. Introduction To Information Technology

  22. DIGITAL CAMERA • Capture a picture in digital (computer-readable) form. • Transfer image directly from the camera to the computer. • Uses an image sensor to capture hundreds of thousands of tiny squares calledpixels. Introduction To Information Technology

  23. OUTPUT DEVICES • Computer monitors • Speakers • Earphones • Printers Introduction To Information Technology

  24. PRINTERS • 3 main types : • Dot matrix printers produce characters and illustrations by striking pins against an ink ribbon. • Ink jet printers shoot tiny drops of ink onto paper. • Laser printer produces better quality black text documents and usually turns out more pages at a lower cost per page than inkjets. Introduction To Information Technology

  25. Printers DOT MATRIX LASERJET INKJET Introduction To Information Technology

  26. MONITOR • Allows you to see images / text. • Sizes including 15, 17, 19 and 21-inch Introduction To Information Technology

  27. Monitors Cathode Ray Tube (CRT) Monitor Flat Screen Monitor Touch Screen Monitor Introduction To Information Technology

  28. SPEAKERS AND EARPHONES • SPEAKERS are devices that connect to a computer and make sound and music audible. • EARPHONESare output devices. Plug earphones into your speaker, monitor, or case to listen to music, movie clips and other media. Introduction To Information Technology

  29. How Does a Computer Work ? OStakes over BIOS launches Operating System BIOS software does it’s thing (looks at system’s memory, software, etc…) Press the “ON” button Introduction To Information Technology

  30. How Does a Computer Work ? OS saves settings for next time All active programs closed by OS Close program and click “Shut Down” Introduction To Information Technology

  31. TERMINALS • 2 types of personal computer : • IBM compatibles • Macintosh. Introduction To Information Technology

  32. TYPES OF COMPUTERS Server • Manages a network of computers. Laptop • Sometimes called a notebook computer. • Laptops users typically don't use a mouse to navigate around the screen. Introduction To Information Technology

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