OLTP

category of software designed to manage data entry and retrieval tasks; method of real-time processing in which a computer immediately responds to the user's commands and actions

Online transaction processing, or OLTP, refers to a class of systems that facilitate and manage transaction-oriented applications, typically for data entry and retrieval transaction processing. The term is somewhat ambiguous; some understand a "transaction" in the context of computer or database transactions, while others (such as the Transaction Processing Performance Council) define it in terms of business or commercial transactions. OLTP has also been used to refer to processing in which the system responds immediately to user requests. An automatic teller machine (ATM) for a bank is an example of a commercial transaction processing application.
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On-Line Transaction Processing

ON-LINE TRANSACTION PROCESSING. OLTP