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Computers PowerPoint PPT Presentation

Computers. A technology of change. Computer Technology. Everyone needs to know the components of the equipment you will be using. Hardware. Anything physical That you can touch. Identify Computer Hardware. Important to know and understand the equipment you will be using

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A technology of change

Computer Technology

  • Everyone needs to know the components of the equipment you will be using


  • Anything physical

  • That you can touch

Identify Computer Hardware

  • Important to know and understand the equipment you will be using

  • This class uses the DOS based Personal Computer platform

The Computer Tower

Also referred to as the CPU

Floppy Drive

Power Switch

Compact Disk





  • Central Processing Unit

  • The intelligence of the computer

    • All processing occurs within the CPU

Inside the Chassis

Where the processing components are housed

CPU Circuitry

  • Silicon chips

    • Contain miniaturized circuitry

    • Placed on boards

    • Plugged into slits

    • Within the CPU

  • Process instructions given to the computer


  • ROM

    • Read Only Memory

    • Built into computer

    • Non-volatile (permanent)

  • RAM

    • Random Access Memory

    • Memory chips

    • Volatile – can be changed

    • Temporary while working

Memory – RAM

  • Random Access Memory

Hard Drive

  • The memory storage bank for the computer

  • Software and data stored on it

  • Size of memory storage is measured in:

    • Megabytes

    • Gigabytes

Hard Drives

Processing Cards

  • Mini-processing chips and circuits

  • Each performs a special and unique function

    • Video Card

    • Audio Card

    • Modem

    • Ethernet Card

    • Device Manager

    • Etc.

Processing Cards

  • Many Types

Video, Audio, Modem, Ethernet, Etc.


  • Hardware

  • Anything external (outside of) the chassis/CPU

  • Many types of functions and equipment


  • Anything outside of the Chassis

Two Types

  • There are two types of peripherals

    • Input

      • User sends data to the computer

      • User gets data and/or information from the computer

    • Output

  • Called I/O

    • In/Out


  • Input and Output Devices



Input Devices

Any Device that the operator uses to put data into the computer


  • Input device for individual characters and commands

  • Alpha, numeric, symbols, functions


Input device that inputs data easier than keyboard commands


Floppy Drive

Portable Storage Devices

  • Either Input or Output

  • Save and transfer data and/or information between computer and portable storage device

  • Uses a corresponding disk drive

Floppy Drive & Disks

Zip Drive & Disk

CD Drive & Disk

Thumb Drive & USB Port

Image/Data Capture

  • Input devices that capture data and/or images

  • Programmed to transfer the data directly into the computer



Barcode Reader


Sound Capture

  • Devices that capture sound from an external source (peripheral)

  • Then transfer that sound as a digital file into the computer


MIDI Devices

Miscellaneous Input Devices

  • There are a broad range of other input devices

  • Just a few are shown here

  • Perhaps you can think of something else?

Game Tools

Handheld Computers

Global Positioning Systems (GPS)

Output Devices

All hardware that the operator uses to download information


  • Looks like a television screen

  • Displays information

    • Of a program

    • Text being input at keyboard

  • Quality and size vary


  • Output images and sound

  • Similar to monitors


  • When you create a document in a program

    • It is a Soft Copy

  • If you want a Hard Copy

    • You need to print it

  • Printers output your information onto paper



  • Speakers are sound output devices

  • Quality and size vary greatly


  • Projectors output video and sound

  • Send images to an external screen

Portable Storage Media

Both I and O

Handheld Computers

Both I and O


  • Find a computer outside of this classroom

    • State what computer it is and where you found it

    • Classify it as new, moderately new or outdated

  • List all of the peripheral devices on that computer

    • Classify them as Input or Output

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