Final answer:
The people outside the organization who purchase or lease products and services are called customers. They include vendors, suppliers, and others not from the organization.
Step-by-step explanation:
The people outside the organization who purchase or lease products and services are known as customers. This group includes vendors, suppliers, people on the telephone, and others not from the organization. Customers are individuals or organizations that pay for the products or services either directly or indirectly.
For example, in the context of a concert producer, the concert attendees who purchase concert tickets are the customers. They are outside the organization but they contribute to the revenue by buying tickets.
In the case of outsourcing, the companies or individuals who hire labor from sources outside of their own organization are also considered as customers as they are purchasing the service of labor from external sources.