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 epidermal layer is the thinnest of the layers and is made up of its own set of thinner layers. The outermost layer is composed of keratin (a fiber protein) cells. These cells combine with a thin layer of oil to create a water-proof layer. Beneath this is a clear transparent layer through which light can pass.