Computer Basic Information
Which is not necessary when using bar codes in supermarkets?

Price on the goods
Check digit on the bar code
Point-of sale (POS) terminal
None of these
Price on the shelf

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Computer Basic Information
Which of the following best describes a computer-based information system?

A system in which a computer is used to turn data into information
Processing data
Inputting data
Performing complex mathematical calculations
Data is put into the computer for processing

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