Constraints : A limit to what a system can accomplish.

Interfaces : Point of contact where a system meets its environment or where subsystems meet each other.

Environment : Everything external to a system that interacts with the system.

Purpose : The overall goal or function of a system.

Boundary : The line that marks the inside and outside of a system and that sets off the system from its environment.

Interrelated components : Dependence of one part of the system on one or more other system parts.

Components : An irreducible part or aggregation of parts that makes up a system also called a subsystem.

The system takes input from outside, processes it, and sends the resulting output back to its environment. A boundary separates the system from its environment. A detailed explanation of each characteristic follows, system exists within a larger world, an environment. For example, a system in the payroll department keeps track of checks, whereas an inventory system keeps track of supplies. System is an interrelated set of business procedures (or components) used within one business unit, working together for some purpose.

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Characteristics of a computer system