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.
For MasterCard cards, the Card Validation Code (CVC) is a 3-digit code that is usually printed on the signature panel on the back of your card (see card image at right). It appears immediately after the card number or partial card number.