A financial transaction is an agreement, communication, or movement carried out between a buyer and a seller to exchange an asset for payment. It involves a change in the status of the finances of two or more businesses or individuals. wikipedia.org

The point of sale (POS) or point of purchase (POP) is the time and place where a retail transaction is completed.

In computer science, transaction processing is information processing that is divided into individual, indivisible operations, called transactions.

Network monitoring is the use of a system that constantly monitors a computer network for slow or failing components and that notifies the network administrator (via email, SMS or other alarms) in case of outages. wikipedia.org

The business activity statement (BAS) is a form submitted to the Australian Taxation Office by all businesses to report their taxation obligations. wikipedia.org

The Information Technology Infrastructure Library (ITIL), is a set of good practices for IT service management (ITSM) that focuses on aligning IT services with the needs of business. In its current form (known as ITILv3 and ITIL 2011 edition), ITIL is published in a series of five core wikipedia.org

IT service management (ITSM or IT services) is a discipline for managing information technology (IT) systems, philosophically centered on the customer's perspective of IT's contribution to the business.