1. * Input Units. * Output Units. * Storage Units. The physical elements of a computer, its hardware, are generally divided into:

2. Any machine that used to transfer data from the outside world into a computer system such as a keyboard, scanner, mouse or digitizer tablet. Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard First page camera

3. keyboard A keyboard is made up of individual keys representing individual letters, numbers, and symbols. First page Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera

4. A mouse is a small plastic box with buttons on top and a rolling ball or optical 'reader' underneath. Ball mouse Mechanical mouse. Optomechanical mouse. Optical mouse; (Uses a laser). First page There are three basic types of mice: Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera

5. First page scanners A device that can electronically read text or pictures and save them in a format where they can be used in other packages such as Word. Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera photomultiplier tube Flatbed scanners Sheet-fed scanners Handheld scanners Drum scanners

6. An input device that utilizes a light-sensitive detector to select objects on a display screen. A light pen is similar to a mouse, except that with a light pen you can move the pointer and select objects on the display screen by directly pointing to the objects with the pen. First page light pen Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera

7. A camera that stores images digitally rather than recording them on film Types of digital cameras First page Digital Camera Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera Ultra compact digital cameras Compact digital cameras Advanced digital cameras

8. A computer monitor ( a touch-sensitive) attachment that can sense the location at which a viewer touches the screen to respond to a question or prompt in a script. Y ou can use your finger to operate it. There are three types of touch screen technology: First page Touch Screen Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera Resistive Surface wave Capacitive

9. Capture notes and images from the marker board! Increase efficiency and participation, reduce meeting time by eliminating notetaking-save, print, archive and distribute meeting notes. Increase efficiency by saving time, printing, distributing and archiving meeting notes First page Electronic Board Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera

10. Used mostly for computer flight simulators and action games, a joystick is an input device that transfers movements you make with the device into movements on your computer screen. First page Joystick Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera

11. A device that converts sound waves into analogous electrical waves. First page Microphone Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera Types of Microphones Carbon microphones Dynamic microphones Ribbon microphones Condenser microphones Crystal microphones

12. Bar Code A Bar Code is just a different way of encoding numbers and letters by using a combination of bars and spaces of varying widths. Types of Bar Code reader: -Pen Type Readers or Bar Code wands -Laser Barcode Scanners - CCD Barcode Scanners -Camera Based Barcode Readers barcode reader First page Touch screen Electronic board joystickBar code Light pen scanner mouse microphone keyboard camera

13. First page printerplotterspeakersmonitor Equipment that receives electrical pulses from the computer and either causes an action to occur, generally in controlling the manufacturing process functions, or passively records data.

14. A display screen used to present output from a computer. LCD (Liquid Crystal Display) First page printerplotterspeakersmonitor Computer monitor CRT (Cathode Ray Tube)

15. A printer outputs data that is seen on the computer screen A device that prints text or illustrations on paper.. Some types of printers. First page printerplotterspeakersmonitor Printer Ink-jets (bubble-jets) printers Laser printers LED/LCD printers

16. Plotter A plotter is a printer that interprets commands from a computer to make line drawings on paper with one or more automated pens. Plotter Types: First page printerplotterspeakersmonitor Pen Plotters Inkjet Plotters

17. An electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance. Synonymous with loudspeaker. Types of Speakers: First page printerplotterspeakersmonitor Speaker Coaxial Separates Horns Separates Subwoofers Separates

18. Computer data storage, often called storage or memory, refers to computer components, devices, and recording media that retain digital data used for computing for some interval of time. Computer data storage provides one of the core functions of the modern computer, that of information retention First page Hard disc CD Tape Drives USB flash disc Floppy disc

19. Floppy disk Floppies come in three basic sizes: · 8 - inch: · 5¼-inch: · 3½-inch: A floppy disk is a data storage medium that is composed of a disk of thin, flexible ("floppy“). First page Hard disc CD Tape Drives USB flash disc Floppy disc

20. hard disk drive (HDD), commonly referred to as a hard drive, hard disk or fixed disk drive,[1] is a non-volatile storage device which stores digitally encoded data on rapidly rotating platters with magnetic surfaces. First page Hard disc CD Tape Drives USB flash disc Floppy disc Hard disk

21. CD is an optical disc used to store digital data, originally developed for storing digital audio. Some variations of the CD include: CD-ROM CD-i CD-RW CD-ROM XA CD-W Photo CD Video CD First page Hard disc CD Tape Drives USB flash disc Floppy disc Compact Disc

22. A device, like a tape recorder, that reads data from and writes it onto a tape. Computer Tape Drives -Tape drive ABCs - Tape drive standards - Other Backup Solutions - Technical Support - Tape definitionsTape drive ABCsTape drive standardsOther Backup SolutionsTechnical SupportTape definitions First page Hard disc CD Tape Drives USB flash disc Floppy disc Tape drive

23. USB flash drive A USB flash drive is a NAND-type flash memory data storage device integrated with a USB (universal serial bus) connector. USB flash drives are typically removable and rewritable, much shorter than a floppy disk (1-4 inches or 25-102 mm), and weigh less than 2 ounces (56 g). n.) A small, portable flash memory card that plugs into a computer’s USB port and functions as a portable hard drive. USB flash drives are touted as being easy-to-use as they are small enough to be carried in a pocket and can plug into any computer with a USB drive First page Hard disc CD Tape Drives USB flash disc Floppy disc USB flash drive