Pointâofâsale transactionsâi.e., swiping a card at the time of purchaseâsecurely encrypt the. credit card data. Cards placed on file for future transactions, such as for express checkâout, use. tokens to access card data.
The outermost layer of Earth is the atmosphere. I say the atmosphere is the outermost layer, because it is as much a part of the of our planet as the atmosphere of other planets is a part of their definition.
The epidermis is composed of the outermost layers of cells in the skin Epidermis is the outer layer of cells covering an organism, in  particular. Your epidermis is the outer layer of your skin. Anything that is not your skin.    Epidermis-- The uppermost layer of skin cells. The epidermis is the outer covering of a living thing or organism.