Reader: a piece of electronic equipment that reads information from plastic cards, tapes, etc.: Swipe the customer's card through the reader.

technical, a piece of electronic equipment that can read information that is stored or recorded somewhere, for example on a card.

a piece of electronic equipment which understands data or symbols • a barcode reader

a unit that scans material recorded (as on punch cards) for storage or computation

تُستخدم وحدات القراءة هذه للتحكم في دخول الأشخاص من الأبواب وماكينات المترو وما إلى ذلك