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Computer Systems


INPUT        PROCESS   OUTPUT
What is a computer system?
• A computer system is a mix of
  electronic hardware and software.
• It accepts data as input and
  processes it to provide us with an
  output, such as information or a
  physical action.
• But it can only follow the
  instructions that we give it.
Computer systems in the home
Computer systems out and about
Input, Process and Output
• A computer system is made up of three
  main parts.


  INPUT         PROCESS         OUTPUT

                  DATA
             INFORMATION
Input
Push the ‘capture’ button to
take a photograph.
Process
Light is captured through
the camera lenses and
transformed to create a
digital image.
Output
The digital image is shown
on the monitor screen.
INPUT

• A computer system accepts data and
  instructions at the input stage.
• Input devices, such as a keyboard or
  sensor, are used to collect and provide the
  computer system with data or instructions.
              Motion sensor
Common input devices
Data
• Data is a collection of facts about
  something or somebody.
• It could be a collection of numbers,
  letters, dates, images and sound.
• For example, your height, age, shoe size,
  hair colour and gender etc is data.
• This data can be used in many different
  ways to provide information about you.
PROCESS

• Data and instructions are processed by a
  central processing unit (CPU).
• A CPU is the computer system’s brain that
  can transform data from input devices into
  useful information or a physical action.
• The CPU can process data really fast but it
  can’t think for itself. It only does what it
  is told to do by following instructions.
Computer processing
INPUT     PROCESS
Information
 • Data becomes information when it is put
   into context (i.e. given meaning).
• A barcode number is just data on its own.
   So is the product name, image and price.
• But this data becomes meaningful
  information when the data is put together.
• When a barcode is scanned, we can find
  out what item it is, what it looks like and
  how much it will cost.
OUTPUT

• An output is when the computer
  communicates the results of the processed
  data.
• The data has been transformed into useful
  information that we can see and use.
• This information is usually shown on a
  display monitor or paper printout and it
  should be easy for us to understand.
Common output devices
Computer systems are just…

INPUT     PROCESS     OUTPUT
Raspberry Pi Computer
             TV only     Speakers        Keyboard
                                          / Mouse

       CPU

                                          Printer




                                          Network
                                           Cable

                                     TV /
Memory /                            Monitor
 Storage
Computer Systems




              Created by C Corbett

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Computer Systems - Input, Process, Output

  • 1. Computer Systems INPUT PROCESS OUTPUT
  • 2. What is a computer system? • A computer system is a mix of electronic hardware and software. • It accepts data as input and processes it to provide us with an output, such as information or a physical action. • But it can only follow the instructions that we give it.
  • 5. Input, Process and Output • A computer system is made up of three main parts. INPUT PROCESS OUTPUT DATA INFORMATION
  • 6. Input Push the ‘capture’ button to take a photograph. Process Light is captured through the camera lenses and transformed to create a digital image. Output The digital image is shown on the monitor screen.
  • 7. INPUT • A computer system accepts data and instructions at the input stage. • Input devices, such as a keyboard or sensor, are used to collect and provide the computer system with data or instructions. Motion sensor
  • 9. Data • Data is a collection of facts about something or somebody. • It could be a collection of numbers, letters, dates, images and sound. • For example, your height, age, shoe size, hair colour and gender etc is data. • This data can be used in many different ways to provide information about you.
  • 10. PROCESS • Data and instructions are processed by a central processing unit (CPU). • A CPU is the computer system’s brain that can transform data from input devices into useful information or a physical action. • The CPU can process data really fast but it can’t think for itself. It only does what it is told to do by following instructions.
  • 12. Information • Data becomes information when it is put into context (i.e. given meaning). • A barcode number is just data on its own. So is the product name, image and price. • But this data becomes meaningful information when the data is put together. • When a barcode is scanned, we can find out what item it is, what it looks like and how much it will cost.
  • 13. OUTPUT • An output is when the computer communicates the results of the processed data. • The data has been transformed into useful information that we can see and use. • This information is usually shown on a display monitor or paper printout and it should be easy for us to understand.
  • 15. Computer systems are just… INPUT PROCESS OUTPUT
  • 16. Raspberry Pi Computer TV only Speakers Keyboard / Mouse CPU Printer Network Cable TV / Memory / Monitor Storage
  • 17. Computer Systems Created by C Corbett