cntctlss smrt crd s cntctlss crdntl whs dmnsns r crdt crd sz. ts mbddd ntgrtd crcts cn str (nd smtms prcss) dt nd cmmnct wth trmnl v NFC. Cmmnplc ss ncld trnst tckts, bnk crds nd pssprts.
Thr r tw brd ctgrs f cntctlss smrt crds. Mmry crds cntn nn-vltl mmry strg cmpnnts, nd prhps sm spcfc scrty lgc. Cntctlss smrt crds cntn rd-nly RFD clld CSN (Crd Srl Nmbr) r D, nd r-wrtbl smrt crd mcrchp tht cn b trnscrbd v rd wvs.