Service refers to processes rather than physical products and may involve people or objects managed by people. A customer purchases goods or services from a business. Services are classified as tangible or intangible. Tangible services involve people processing like healthcare or possessions processing like transportation. Intangible services provide mental stimuli like education or information processing like banking. Customers are also classified based on their purchases, orientation, and scale - from small-scale individual customers to large-scale business customers.