题目内容
Supermarkets use _______ to scan codes printed on product containers.
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The most common card reader is the _______ card reader which reads encoded information stored on a thin magnetic strip located on the back of the card.
_______ tags are tiny chips that can be embedded into almost anything and contain information used to track and locate lost pets; to monitor production and update inventory; to record prices, product descriptions, and locations of retail items.
_______ recognition is often used to score standardized multiple-choice tests.
_______ are specialized digital video cameras that capture images and send them to a computer for broadcast over the Internet.
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