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.
In this example, 1234 are the last four digits of the credit card number, and 567 is the CSC. American Express The Card Identification Number (CID/4DBC) is a four-digit, non-embossed (flat) number that is printed on every American Express Card. The CID/4DBC is ALWAYS located ABOVE the embossed (raised) account number on the face of the card. In some instances, the CID/4DBC is located on the left side of the card, but is always above the account number. Some cards have a four-digit number embossed below the account number, but this is not the CID/4DBC.