1. GCSE COMPUTER SCIENCE
Topic 4 - Computers
4.1 Machines and Computational Modelling

2. This presentation covers the following content from the specification
Students should:
4.1.1 understand the input-process-output model

3. Computer Systems
What makes a computer system? Part A. Watch the following video:
Link:

4. Drag the pictures to the correct categories, computer system or not:
Activity 1
Drag the pictures to the correct categories, computer system or not:
Computer systems
Non-computer systems

5. Activity 2 Class Discussion Four Elements
So what does make a computer system?
ACTIVITY
Draw this diagram in your workbook

6. Key Terms Below are three key terms you need to understand Input
To enter data into a computer system
Process
To change the meaning or format of some data
Output
To receive data that has been processed or stored
ACTIVITY
Write the three definitions above in your workbook

7. Computer Systems
What makes a computer system? Part B. Watch the following video:
Link:

8. Computer Systems PC Example CPU, GPU
Keyboard, mouse, microphone, webcam, touchscreen
Monitor, speakers, headphones, touchscreen
Hard drive, USB stick, CDs
NOTE: A touchscreen can be both input and output

9. Activity 3
List the inputs and outputs of each of the following Computer Systems below:
Device Name
Inputs
Outputs
Laptop
Washing Machine
Calculator
Xbox One
Smart Phone
Digital Watch
Microwave

10. Activity 3 Laptop INPUTS OUTPUTS Touchpad Monitor Microphone Speaker
Keyboard

11. Activity 3 Washing Machine INPUTS OUTPUTS Buttons Monitor (screen)
Dial
Motors
Heat

12. Activity 3 Calculator INPUTS OUTPUTS Buttons Monitor (screen)
Solar panels

13. Activity 3 Xbox 360 INPUTS OUTPUTS Buttons Speaker Microphone
Monitor (screen)
Movement (Kinect)
Vibration

14. Activity 3 Smartphone INPUTS OUTPUTS Touchscreen Speaker Microphone
Monitor (screen)
Camera
Vibration
Fingerprint reader
Flash light
Proximity sensor
Accelerometer
Gyroscope

15. Activity 3 Digital Watch INPUTS OUTPUTS Buttons Monitor (screen)
Speakers
Vibration

16. Activity 3 Microwave INPUTS OUTPUTS Buttons Monitor (screen) Touchpad
Heat
Light

17. Activity 4
Fill in the blanks
Write out the following sentences, use the words below to fill in the gaps correctly:
A computer system has one or more __________ to provide data. This __________ is then __________ in some way. The outcome of the __________ is sent to an __________ device. For processing to take place, there needs to be a set of __________ of what needs to be done. This set of instructions is called a __________. This __________ is called a stored-program computer.
Words to use: program, system, processing, processed, output, instructions, data, inputs.

18. Write out the following summary in your workbook.
Activity 5
4.1 Summary
Write out the following summary in your workbook.
Although computers come in all sorts of shapes and sizes they all do principally the same thing.
They take inputs, process them according to a given set of rules, and generate outputs.
Algorithms (a set of rules that are followed to complete a task) expressed in program code specify the processes a computer carries out.