Computing - Input & Output Devices

What’s an example usage of barcodes?

What concept allows barcode readers to work?

What does a black bar represent in a barcode?

Why does black represent $0$ in barcodes?

What does a white bar represent in a barcode?

Why does white represent $1$ in barcodes?

What does UPC-A stand for?

What is UPC-A?

What does EAN stand for?

What are the two common standards for product barcodes?

What are “Code 128” barcodes used for?

What does the large left number represent?

What does the large right number represent?

What is the far right number?

This image contains identical bars at the beginning, middle and end. What are these called?

Why is the left hand side and the right hand side the exact opposites?

If you have $0010$ on one side of a barcode, what do you have on the other?

What does $QR$ stand for?

What does $CCD$ stand for?

What does $CMOS$ stand for?

What is better: A $CCD$ or $CMOS$?

What is a $CCD$ or a $CMOS$?

What are the two types of camera sensors?

What happens when a camera’s shutter opens?