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 mantle layer is the largest of the class. About half of our planetâs mass. Extract from http://www.educationalrap.com/song/layer... The Crust. Outermost layer, thickness varies from 5 km under the oceans to about 60 km under some mountain ranges. The composition of the crust varies from the continents to the ocean.