Introducing ICT systems
Introducing ICT systems

This free course is available to start right now. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation.

Free course

Introducing ICT systems

16.2.1 Receiving data

In a supermarket ICT system, there needs to be some way for the computer to receive information about the items a customer is buying.

Activity 13 (exploratory)

Think back to a recent visit to your local supermarket and how you made your purchases at the checkout. How did the checkout operator input information about your purchases?

Discussion

This probably involved the checkout operator using a bar code reader to scan the bar code printed on the label of each of your purchases. If an item doesn't have a bar code or, if for some reason, the bar code can't be read, the checkout operator has a keypad for entering the data.

A bar code is a pattern of narrow and wide stripes which can be read by a machine. A bar code reader is a device which optically scans the bar code and converts the stripes into numerical data which can be automatically input to the checkout computer.

T175_3

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to university level study, find out more about the types of qualifications we offer, including our entry level Access courses and Certificates.

Not ready for University study then browse over 900 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus