(1) A user of an online store.
(2) A person or organization, internal or external to the producing organization, who takes financial responsibility for the system. In a large system this may not be the end user. The customer is the ultimate recipient of the developed product and its artifacts. See also stakeholder.
(3) A group or organisation that is associated with one or more applications. A customer can be an external organisation that accesses a data centre or an internal department within a company.