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Identify the missing word(s) in the following sentence within the context of Microsoft Azure. A(n) [?] system is often what most people consider the primary function of business computing. A [?] system records transactions. This could be financial, such as the movement of money between accounts in a banking system, or it might be part of a retail system, tracking payments for goods and services from customers. [?] systems are often high-volume, sometimes handling many millions of transactions in a single day.