An exchange or business deal in which goods, services, or money are passed between people or organizations.
It comes from Latin 'transactio', from 'transigere' meaning 'to drive through', 'to settle', or 'to accomplish'. The sense of a completed business deal developed from this idea of finishing something through action.
In computing, a 'transaction' must either fully happen or not happen at all—no half-charged credit cards. The word reminds us that in both money and data, what really matters is a clean, agreed finish.
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