Operating Instructions

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opera bouffe opera cloak opera comique opera company opera glasses opera hat opera hood opera house opera star operable operagoer	operameter operance operand operant operant conditioning operate operate on operatic operatic star operating operating budget	operating capability operating capital operating cost operating expense operating microscope operating procedure operating room operating statement operating surgeon operating system operating table	operating theater operating theatre operation operation code operation desert storm operational operational casualty operational cell operational damage operationalism operationalist