Q1.How many different things did you count? What were they ? In what ways might computers be used to control different things in the supermaket?
A.i count 6.microwave,car,computers,robots,stellite navigation,credit card.light

Q2.Why is it useful to use computers rather than people to control things? What problems might there be if any of the computer systems fail in the supermarket?
A.computers can more faster than people to control things.It cann't work.

Q3.Describe the inputs and outputs for the other devices that we have talked about so far . How do the supermarket dorrs and car park barrieers know when to open? Identify other control systems that work automatically in this way.
A.input-quite a lot of devices use buttons or keypads of some sort as a way of inputting instructions,output-of some description.
have computer control it.
e.g;toilet flash automatically

Q4.What would happen if the instructions were wrong? These instructions assume that the car is in the right place.What would happen if the car were not there?How could they stop this happening.
A will make people die.
the car will can't move.
they made the stop thing to the car.