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 outermost or upper layer of the skin is called the epidermis (this is the part that we see, feel and touch). The epidermis, which consists of several layers, is mostly made of dead epithelial skin cells. Directly beneath the epidermis, is the other primary skin layer, which is called the dermis.