1. Aims: To be able to define a computer system
To describe the importance of computer systems in the modern world

2. Why are we learning this?
This topic introduces computer systems and provides a foundation for the remaining topics in this unit
This will be part of the exam and you will have to answer questions on it

3. Computer Systems
A computer is an electronic, programmable data processing machine
A system is a collection of parts that work together for some defined purpose
A computer system is a collection of hardware and software that works together to achieve some data processing task
Systems receive inputs from the outside. They process these inputs. They output the results of the processing

4. Importance of Computer Systems
Improved quality in manufacturing – robotic machinery is more accurate than humans
Cheaper manufacturing – automation reduces wage costs and allows 24/7 working
Faster access to information – many jobs can be done more quickly
Better decision making – with lots of facts organised and available, decisions can be better informed
New ways of doing business – more buying online, more choice, cheaper goods; facilities such as the internet and ATMs would not be possible without computer systems
New ways of communicating – , SMS, mobile phones are being developed all the time.

5. Examples of Computer Systems
Input (examples)
Outputs (examples)
Processing
Car engine management
Temperature, CO2 levels, speed
Signals to carburettor, data to engine diagnostics
Check values against set parameters, produce fault codes
Holiday booking
Dates, destinations, credit card details
Itineraries, air tickets, hotel reservations
Check availability, produce documents
Washing machines
Temperature, water levels, dirtiness
Signals to motor, heater, timer
Check values, determine washing parameter

6. Task In pairs: Choose one of these items:
MP3 player, SAT Nav, ATM, TV Set Top Box, Digital Camera, Mobile phone, Photocopier, Microwave
State the inputs, outputs and processing of it
Research and find out how their function was carrie4d out before computer technology was available and report this back to the class.
You need to present this creatively and as a learning resource. Use whatever resources you can find in the room and make it interesting.

7. Literacy and Numeracy opportunities
SPAG
Space, shape and measure
Key words
Logic
Writing for an audience
Computational thinking
Using the convention of standard English

8. Chips with everything…

9. Homework
Make a list of electronic equipment that you have at home which would qualify as a computer