A context diagram is drawn in order to define and clarify the boundaries of the software system. The bank system context diagram, sometimes called a level 0 data-flow diagram, identifies the flows of information between the system and external entities. Bank System level 0 data-flow has elaborated the high-level process of banking. The bank system context diagram is a basic overview of the whole banking system and is designed to be an at-a-glance view of bank managers, customers, sales agents, and relations with other banks. The context diagram shows how bank managers send open and close account requests to the bank systems. Also, the level 0 data-flow diagram shows how third parties initiate the money transfer to the bank system.