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OMNL open music notation language (EN)
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OMR optical mark recognition
(EN)
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OMS object management system (EN)
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OMS open metering system (EN)
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OMS output management system (EN)
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OMS outage management system (smart grid)
(EN)
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OMS order management system (e-commerce)
(EN)
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OMS optical multiplex section (OTS)
(EN)
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OMSS operation and maintenance subsystem (mobile communications)
(EN)
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OMT orthonal mode transducer (polarization) (EN)
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OMTP open mobile terminal platform
(EN)
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OMUX optical multiplexer (OTH)
(EN)
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ON optical network
(EN)
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