An internal customer is defined as a unit within the university's financial structure. Rates for goods and services provided to internal customers (also known as Internal Sales Activities or ISAs) ...

The Internal Revenue Service ordered customer service employees back to the office. There was just one problem: not enough desks.

Hallowell, Roger, Leonard A. Schlesinger, and Jeffrey Zornitsky. "Internal Service Quality, Customer and Job Satisfaction: Linkages and Implications for Managers." Human Resource Planning (fall 1996).