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 the outermost layer of the skin. Its thickness depends on the type of skin. For example, it's thinnest on the eyelids at half a millimeter. On the palms of the hands and soles of the feet, it's thickest at 1.5 millimeters. The bottom layer, the stratum basale - also known as the basal cell layer - has column-shaped basal cells that divide and push older cells toward the surface of the skin.