Overseas, chip-and-PIN technology is the norm for credit cards. If yours only has a magnetic strip, it might not work everywhere.
from Travel Feedly http://www.ibtimes.com/traveling-abroad-make-sure-you-have-credit-card-works-everywhere-1624880
from Travel Feedly http://www.ibtimes.com/traveling-abroad-make-sure-you-have-credit-card-works-everywhere-1624880