what is a pos 
a pos or point of sale is a device that enables merchants to process payments and log transactions it is essentially a computer based cash register with software capable of tallying up orders taking payments monitoring inventory and buying trends creating invoices and collecting marketing data pos technology includes countertop terminals and apps that let people or businesses take payments with connected devices such as smartphones a pos may be a physical device in a brick and mortar store or a checkout point in a web based store 