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O object
(en)
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O-Mass optical magnetic storage
(en)
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O-RAN open radio access network (5G)
(en)
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O2O online to offline
(en)
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OA optical amplifier (fiber optics)
(en)
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OABR open alliance broadR reach (automotive)
(en)
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OAD Optische Anschlussdose
(de)
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OAD Optische Anschlussdose
(de)
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OADM optical add/drop multiplexer (OTH)
(en)
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OAF optical attenuator fiber
(en)
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OAG open application group
(en)
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OAIS open archival information system
(en)
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OAM operation, administration, and maintenance
(en)
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OAN optical access network (MAN)
(en)
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OAP outdoor access point (PLC)
(en)
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OAS overtaking assistant system (DAS)
(en)
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OASIS organization for the advancement of structured information standards
(en)
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OASIS online application interactive software
(en)
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OAsl Ortsanschlussleitung
(de)
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OAsl Ortsanschlussleitung
(de)
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OAuth open authentication
(en)
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oAW openArchitectureWare
(en)
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OBC on-board charger (automotive)
(en)
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OBD on-board diagnostic
(en)
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OBEX object exchange (IrDA, Bluetooth)
(en)
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OBI open buying on the Internet (eCommerce)
(en)
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OBIS object identification system (smart meter)
(en)
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oBIX open building information exchange (security)
(en)
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OBJ object file
(en)
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OBR optical burst router
(en)
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OBSAI open base station architecture initiative (base station)
(en)
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OBSS overlapping basic service set
(en)
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OBU on-board unit (automotive)
(en)
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