Computer System Hardware
Nov 07, 2014
A powerpoint presentation for EDP 111
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An input device lets you communicate with a computer. You can use input devices to enter information and issue commands. Most common input devices are:
KeyboardKeyboard ScannerScanner
Digital CameraDigital CameraPointing DevicesPointing Devices
>used to type data into the computer.
>has special keys for giving the computer commands.
>commands tell the computer to do something, like save the file.
>allows you to scan documents, pictures, or graphics and view them on the computer.
>converts an image into dots that the computer can understand
o>pointing devices move some object on the screen and can do some action oExample:
MouseMouse
TrackballTrackball
JoystickJoystick
MouseMouse
TrackballTrackball
JoystickJoystick
> a pointing device that rolls around on a flat surface and controls the location of the pointer on the screen.
> consist of a metal or plastic handle mounted on a base that you can move in any direction to move the pointer or other object.
> it is rolling a ball around with your fingers to control the location of the pointer.
MouseMouse
JoystickJoystick
TrackballTrackball
Central Processing Unit / ProcessorCentral Processing Unit / Processor
MicroprocessorMicroprocessor
o>the portion of a computer system that carries out the instructions of a computer program
o> it is the primary element carrying out the computer's functions.
o>incorporates most or all of the functions of a central processing unit (CPU) on a single integrated circuit >constructed out of small and medium-scale ICs containing the equivalent of a few to a few hundred transistors.
Hard DriveHard Drive Floppy DriveFloppy Drive
CD-ROM DriveCD-ROM DriveRemovable Hard DiskRemovable Hard Disk
>it is the primary device that a computer uses to store information and stores programs, data files, saves files, and organizes files. >it magnetically stores data on stacks of rotating disks called platters.
>small, portable disks that hold a limited amount of data
>it stores and retrieves information on a floppy disk.
>it is a device that reads information stored on a compact disc.
>it stands for CD Read Only Memory.
>it can hold large amounts of data, but is read-only access.
>a zip disk is a removable disk that holds a large amount of information.
>it can be used to achieve, protect and transfer large amounts of data.
>auxiliary storage devices that can be portable.
MonitorMonitor PrinterPrinter
SpeakerSpeaker
An output device displays information on a screen, creates printed copies or generates sound. It enable the computer to give or show you the results of its processing. Examples are:
>shows the processed information on a screen and used to display video output to a user.
>uses a Picture Tube like a television with the image displayed on the front of the tube, which is called the screen.
>used to produce a hard copy
>the information is printed on paper and can be used when the device is off. It is also called a printout.
>Dot Matrix, Ink Jet and Laser are types of printers.
>used to output
sound >used to connect analog audio and video components
>also called a "phono connector"
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