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Three-Tier Architecture came to the fore in the last decade to overcome the shortcomings of the Two-Tier architecture in which the user interface runs on the client server and the database is stored on the server. For a three-tier architecture, a middle layer was developed and was sandwiched between the data management server and the user interface. Termed as process management layer, it is the layer where all the business related logic is executed and can be termed as the core of the Three-tier system.