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Basic Computer Terms Unit 1—Part A

Basic Computer Terms Unit 1—Part A. Computer Technology (S1 Obj 1-2 and Obj 2-3). Why Study Basic Terms?. For some people, the computer aisles at an electronics store can be quite a mystery! Prepare for the State Skills Test U se computers in your future with ease and confidence.

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Basic Computer Terms Unit 1—Part A

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  1. Basic Computer TermsUnit 1—Part A Computer Technology (S1 Obj 1-2 and Obj 2-3)

  2. Why Study Basic Terms? • For some people, the computer aisles at an electronics store can be quite a mystery! • Prepare for the State Skills Test • Use computers in your future with ease and confidence

  3. What is a Computer? • An electronic device that you can use to manipulate, store, retrieve and process data.

  4. Information Processing Cycle

  5. Hardware • The physical, touchable parts of the computer.

  6. Software • A term that is used in contrast to hardware; everything in the computer that is not hardware is software. • Software allows you to: • Process words • Calculate numbers • Send an e-mail • Browse the Internet • And many more…

  7. Input • A collection of raw data from the outside world that is put into the computer. • Example: The payroll clerk collects workers' timecards so she knows how many hours each person worked and then types the hours from the timecards into a spreadsheet.

  8. Input Devices • Keyboard • Mouse • Scanner • Digital Camera • Bar code reader • Graphic tablets • And many more…

  9. Processing • Manipulating data • Bold, italicize, underline, double space in a word processor • Enter formulas and calculate totals in a spreadsheet • Edit a picture

  10. Storage • The place where data is held when it is not needed for processing • Storage Devices are computer components capable of storing digital data • Examples of Storage Devices: • Floppy Disk (almost obsolete) • Hard Drive • CD, DVD • Flash Drive

  11. Output • The results of processed data • Examples of output: • A printed paper • A presentation • Audio • Video • Data is entered through various forms (input) into a computer, the data is manipulated (processing), and then information is presented to a human (output).

  12. Output Devices • Monitor • Speakers • Printer • Headphones

  13. Peripherals • AKA—Peripheral Devices • Any hardware device connected to the computer that expands the computer’s input, output and storage capabilities

  14. Input and Output Devices • As you continue, you will review several different input and output devices. • You need to be able to identify each device, tell if it is an input or output device and indicate what the devices are used for.

  15. Keyboard • The most commonly used input device • It is made up of : • Alphabetic Keys • Numeric Keys • Function Keys • Command Keys • Connected to the computer through a USB connection or wirelessly

  16. Mouse • Ahand-operated input device that controls the cursor on the screen as you move it around on a desktop • Older = ball style mouse • Newer = “optical” technology • Turn over your mouse. Do you see a red light? If you do, then you are using an optical mouse.

  17. Touchpad • An input device used to move the cursor on a laptop computer • As you slide your finger over the surface, sensors underneath detect the movement, direction and speed • Useful when carrying a mouse is not practical

  18. Trackball • Apointing device that works like a mouse turned upside down; the ball in on top of the device • Advantages: • TrackBall is stationary so it does not require much space. • You can place a trackball on any type of surface, including your lap.

  19. Joystick • Joysticks are input devices, similar to a mouse, that allow you to move the cursor in any direction • Joysticks were originally used by pilots as part of an airplane's controls. Technology developed to let gamers experience a more realistic game environment

  20. Microphone • A microphone is used to input sound • The sound is detected by the microphone and an electronic signal is transmitted to the computer • Special hardware is used to convert the analog data (sound) into digital data so it an be stored and manipulated on the computer.

  21. Scanner • Scanners are used to convert images or text on paper into a digital image format (.bmp, .gif, .jpeg) • Scanners with optical character recognition can convert text on paper into text that can be edited in a word processor

  22. Web Cam • Web cam is short for ‘web camera’ • It is an input device that captures a video or image of the scene in front of it • Some are built into the computer (i.e. Laptop), others are connected via USB cable • Used for chatting online, security and tourism (i.e. view your favorite animal at the zoo online)

  23. Graphics Tablet • Graphics tables are used by graphics designers and illustrators to input data • Create accurate drawings on a screen that could not be produced with a mouse or stylus • Usually consists of a tablet that you draw on and a pen that has pressure sensitive tips allowing the artist to draw heavier and lighter lines

  24. Biometric Devices • AKA—Access Control Devices • Uses a body feature of a person seeking access to identify and authorize that person • Fingerprint scanner • Iris scan • Access card (can be scanned like a credit card or contain a radio frequency transmitter used to identify the card holder) • Britain and Germany have included a microchip in their passport. The microchip contains electronic data unique to each user

  25. Monitor • Most commonly used output device • The picture on a monitor is made up of tiny colored dots called pixels • The quality and detail of the picture depends on the number of pixels that the monitor can display

  26. Ink Jet Printer • An output device that produces a hard copy by spraying ink on paper • Relatively cheap to buy • Can print it both black and white or color • Limitations: • Slow • Not designed for high-volume printing • Ink cartridges are expensive

  27. Laser Jet Printer • A output device that prints similar to a photo copy machine • Uses powdered ink called ‘toner’ to fuse onto the paper by heat and pressure • Black and white versions are relatively cheap to purchase • Capable of quick high-volume printing

  28. Speakers • Most computers have a small internal speaker that produces beeping sounds when you make an error • Computers can be fitted with a sound card which enables sound (audio) to be output through external speakers

  29. Digital Camera • An input device that takes photographs and stores them as digital files on a computer

  30. Projector • A device which connects to a computer and is used to project the output from the computer onto a wall or screen.

  31. Touch Screen • The only device that serves as both an input and output device • You view the options available to you on the screen (output) and then use your finger to touch the option you have chosen (input)

  32. Plotter • A large document printer which is able to draw high quality images on very large pieces of paper (example: 3 feet wide by 10 feet long) • Used by: • Engineers • Architects • Map makers

  33. Biometrics

  34. The End

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