Customer
In sales, commerce and economics, a customer (sometimes known as a client, buyer, or purchaser) is the recipient of a good, service, product or an idea - obtained from a seller, vendor, or supplier via a financial transaction or exchange for money or some other valuable consideration.
Psychology
Psychology is the science of behavior and mind, including conscious and unconscious phenomena, as well as feeling and thought. It is an academic discipline of immense scope and diverse interests that, when taken together, seek an understanding of the emergent properties of brains, and all the variety of epiphenomena they manifest. As a social science it aims to understand individuals and groups by establishing general principles and researching specific cases.
Sales
Sales is activity related to selling or the amount of goods or services sold in a given time period.
Sales
The music of the soul is also the music of salesmanship. Exchange value, not truth value counts. On it centers the rationality of the status quo, and all alien rationality is bent to It.
Herbert Marcuse, One Dimensional Man (1964), p. 57
Sales
The sales department isn't the whole company, but the whole company had better be the sales department.
Philip Kotler cited in: Michael R. Czinkota (1999), Marketing: Best Practices. p. 11
Psychology
Unlike the physicist, the psychologist … investigates processes that belong to the same order — perception, learning, thinking — as those by which he conducts his investigation.
Morris R. Cohen, Reason and Nature (1953), p. 81
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