(1) The part of a distributed application that is concerned with the application logic rather than the user interface of the application. See also presentation logic.
(2) The codified procedures in a business software system that implements an organization's day-to-day operations (such as processing an order, payroll management, and so on). Business logic typically includes industry-standard procedures for business operations and customizations reflecting an organization's unique business policies. In the WebSphere business integration system, business logic can be represented (that is, codified) as a collaboration. See also collaboration.