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GCSE Computer Science > Barcode Readers - UPC-A'S > Flashcards

Barcode Readers - UPC-A'S Flashcards

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1
Q

How do UPC-A systems work?

A

The UPC-A system uses long guard bars to show the start and end of the barcode and also central guard bars to distinguish left uniquely from right.

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2
Q

What is on the left of the UPC-A system barcode?

A

The manufacturer number

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3
Q

What is on the right of the UPC-A system barcode?

A

The product number

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4
Q

What do UPC-A systems use to represent each data item?

A

UPC-A uses seven bar elements to form four alternating dark and light bars of varying thickness to represent each data item between the guard bars

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5
Q

DONT IGNORE - GO LOOK UP THE UPC-A BARCODE ANATOMY. TRY TO FIND WHERE THE GUARD BARS ARE.

A

ok

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GCSE Computer Science (36 decks)

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