Programming languages offer control abstraction as one of the main purposes of their use.
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Transactions provide a concurrency control abstraction for the OS, and can be used to prevent TOCTTOU races.
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This is a control abstraction; a processor that executes NOP will behave identically to a processor that does not process this directive.
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According to the W3C State Chart XML ( SCXML ) : State Machine Notation for Control Abstraction specification, SCXML is a general-purpose event-based state machine language that can be used in many ways, including:
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Without control abstraction, a programmer would need to specify " all " the register / binary-level steps each time they simply wanted to add or multiply a couple of numbers and assign the result to a variable.