Magnetically encoded debit cards, magnetically encoded electronic chip cards, magnetically encoded smart cards, magnetically encoded credit cards, chip encoded smart cards, all for use in tracking frequency of purchases, serving as gift cards, and serving as debit and check cards, at sub sandwich shops

'card':4,9,13,17,21,33,40 'check':39 'chip':8,18 'credit':16 'debit':3,37 'electron':7 'encod':2,6,11,15,19 'frequenc':27 'gift':32 'magnet':1,5,10,14 'purchas':29 'sandwich':43 'serv':30,35 'shop':44 'smart':12,20 'sub':42 'track':26 'use':24

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