A carbohydrate is a biomolecule consisting of carbon, hydrogen and oxygen atoms, usually with a hydrogenâoxygen atom ratio of 2:1; in other words, with the empirical formula Cm(H2O)n. This formula holds true for monosaccharides. Some exceptions exist; for example, deoxyribose, a sugar component of DNA, has the empirical formula C5H10O4. The carbohydrates are technically hydrates of carbon; structurally it is more accurate to view them as aldoses and ketones. The term is most common in ...
Card Security Code (CSC). The card security code (CSC), also known as the Card Verification Value (CVV) is a 3- or 4-digit number associated with your credit card, printed only on the card and not on statements or charge slips.
CVV2/CVC is an authentication method established by credit card companies to reduce fraud for internet transactions. It consists of requiring a card holder to enter the CVV2/CVC number in at transaction time to verify that the transaction is legitimate. The CVV2/CVC on your Visa or Mastercard is the 3-digit verification number found on the back of your card. This is a non-embossed number printed on the signature panel on the back, immediately following the account number.