Tools for information processes intro.pptx

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Tools for information processes intro.pptx Powered By Docstoc
 Whatare some Tools for Information

 Collectingis the information process that
 involves deciding what to collect, locating it
 and collecting it. A range of hardware
 devices are used to collect different types of
 data. Software is used to direct the hardware
 collecting device. Non-computer tools are
 used to collect data particular sources.
 Hardware
    There are many types of hardware collecting
     devices used for different types of data. The
     devices that are used specifically to enter data
     into a computer system are referred to as input

    An Input device should be convenient to use,
     reliable and allow data to be entered accurately.
     The data may be in a number of forms, including
     text, numbers, images, audio, and video.
 Pointing   devices-
    Mouse – is a small hand-held input device that is
     moved over a flat surface to control the
     movement of a pointer.
    Trackball – is a pointing device that is similar to a
     mouse except that the ball is on the top of the
     device instead of the bottom.
    Pointing Stick – is a small device also known as
     trackpoint is shaped like a pencil eraser. It moves
     the pointer by sensing the direction and amount
     of pressure applied to the device.
 Mouse

 Trackball

 Pointing-Stick
   Touchpad – is a flat rectangular surface that
    senses the movement of a finger.
   Graphics Tablet – is an input device that consists
    of a special electronic pad and pen called a
   Joystick – is a pointing device consisting of a
    small base unit with a rod that can be tilted in
    all direction to move the pointer on the screen
   Light Pen – is a pointing device consisting of a
    small rod that looks like a pen. The tip of the
    pen has a light detector that senses the intensity
    of the light in a screen and emit signals to that
    the computer can calculate its position.
 Touchpad

 Graphics      Tablet

 Joystick

 Light   Pen
   Touch Screen – allows data to be entered directly
    by detecting the touch of your finger.

   Pen Input – is a device that is becoming
    increasingly popular. When the pen touches the
    screen, the computer determines the coordinates
    of the contact point and darkens that area. Pen
    input are mostly used in the personal digital
    assistants (PDAs).
 Touch   Screen

 Pen   Input
   Hand-held Scanners – are used for entering text
    and images that are less than a page wide.

   Flatbed Scanners – looks similar to a small
    photocopier with the document remaining flat
    and stationary during the scanning.

   Overhead Scanner – looks like an overhead
    projector. Documents are placed face up on the
    scanning bed and a small overhead tower moves
    across the page.
 Hand-held   Scanner

 Flatbed   Scanner

 Overhead   Scanner
        Cameras – are input devices that
 Digital
 capture and store images in digital form
 rather than on film.

 Video Camera – is used to create a video clip
 in either analog or digital form. This type of
 video camera captures videos and sound and
 exports them onto a videotape.
     Digital Video Camera – is an input device that
      captures video in a compressed digital format
      such as MPEG. These video files are transferred
      directly to a computer.
   Microphones are input devices that capture
    sound. Sound travels through the air in waves
    which is analog data.

   Keyboards are input devices consisting of series
    of keys in a standard layout. It allows the entry
    of text, numbers, instructions and commands.
       The Keyboard is divided into four major areas:
           Alphanumeric Keys – Letters and numbers
           Cursor Control keys – Arrow keys, Page down, Home etc..
           Special Keys – Enter, Return tab, Space, Caps Lock etc..
           Function Keys – F1, F2, F3, ....F12
 OpticalRecognition Devices – use a light
 source to read characters and barcodes.
 They convert these characters into digital
    Optical Character Recognition (OCR) devices are
     scanners that read typed text and in some cases,
     handwritten text.
    Barcode Reader – are used extensively in retail
     industries to input product identification at point
     of sale.
 Optical   Character Recognition (OCR)

 Barcode   Reader

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