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Small portable device used to perform arithmetic.
With a facsimile (fax) it is possible to send documents to and receive from other facsimiles; all you need is your existing phone line. Often facsimiles also have a copy (scan & print) function, although the quality of the copies is not always that great for most machines.
A smart card is a pocket-sized plastic card with embedded integrated circuits. Smart cards can provide identification, authentication, data storage and application processing. Smart card readers are devices which can read smart cards.