| OAK |
Object Application Kernel (ict/lang/java) |
| OAM |
Operations, Administration and Management (org/itu/atm) |
| OAM |
Operations, Administrations and Maintenance (org/itu/m3000) |
| OAOO |
Once and Only Once (jargon) |
| OASIS |
Organization for the Advancement of Structured Information Standards (org) |
| OBGA |
Organic Ball Grid Array (ict/comp/cpu) |
| OCC |
Open Cloud Consortium (org) |
| OCD |
Out-of-Cell Delineation (org/itu/atm) |
| OCL |
Object Constraint Language (org/omg) |
| OCM |
Open Cloud Manifesto (org) |
| OCP-IP |
Open Core Protocol International Partnership (org) |
| OCR |
Optical Character Recognition (ict/graphic) |
| OCSP |
Online Certificate Status (revocation) Protocol (ict/security) |
| Oct |
October (time/moy) |
| ODA |
Office Document Architecture (org/ietf) |
| ODF |
Open Document Format (org/iso) |
| ODL |
Object Definition Language (org/tina-c) |
| ODMA |
Open Distributed Management Architecture (org/itu) |
| ODP |
Open Distributed Processing (org/itu/x900) |
| OEP |
Operand Execution Pipelines (ict/comp/cpu) |
| OF |
Overflow Flag (ict/lang/assembler) |
| OFII |
Organization for International Investment (org) |
| OGF |
Open Grid Forum (org) |
| OH |
Off-Hook (ict/device/modem) |
| OHA |
Open Handset Alliance (org) |
| OHKO |
One Hit Knock Out (jargon) |
| OIC |
Oh, I See (jargon) |
| OID |
Object Identifier (org/itu/x700) |
| OIDF |
OpenID Foudation (org) |
| OIF |
Optical Internetworking Forum (org) |
| OIPF |
Open IPTV Forum (org) |
| OIT |
Object Information Tree (org/itu/x700) |
| OLSR |
Optimized Link State Routing (org/ietf) |
| OLT |
Optical Line Termination (ict/net/optical) |
| OLTP |
On-Line Transaction Processing (ict) |
| OMA |
Open Mobile Alliance (org) |
| OMA |
Object Management Architecture (org/omg) |
| OMEC |
Open Mobile Evolved Core (org/onf) |
| OMG |
Oh My God (jargon) |
| OMG |
Object Management Group (org) |
| ONAP |
Open Networking Automation Platform (org/lf) |
| ONF |
Open Networking Foundation (org) |
| ONOS |
Open Network Operating System (org/lf) |
| ONU |
Optical Network Units (ict/net/optical) |
| ONVIF |
Open Network Video Interface Forum (org) |
| OODA |
Observe, Orient, Decide, Act (people/boyd-john) |
| OOO |
Out Of Order (ict/comp/cpu) |
| OOTB |
Out Of The Box (jargon) |
| OP |
Original Poster (jargon) |
| OpenSAF |
Open Service Availability Framework Foundation (org) |
| OPEX |
Operational Expenditure (biz) |
| OPNFV |
Open Platform for NFV (org/lf) |
| OPS |
Operations Per Second (ict/comp/cpu) |
| Or |
Orchestrator (com/se/ericsson/nm-lab/upt/upee) |
| ORB |
Object Request Broker (org/omg) |
| OS |
Operating System (ict) |
| OS |
Operation System (org/itu/m3000) |
| OS-DMS |
Operating System DMS (org/psoc/rina/dms) |
| OSA |
Open Service Access (ict/net) |
| OSCI |
Open SystemC Initiative (org) |
| OSF |
Oppose Sun Forever (jargon) |
| OSF |
Operations System Function (org/itu/m3000) |
| OSI |
Open Systems Interconnection (org/itu) |
| OSIE |
Open Systems Interconnection Environment (org/itu) |
| OSM |
Open Source MANO (org/etsi/nfv) |
| OSPF |
Open Shortest Path First (org/ietf) |
| OSS |
Open Source Software (ict/dev) |
| OSS |
Operations Support System (ict/net/mgmt) |
| OT |
Off Topic (jargon) |
| OTOH |
On The Other Hand (jargon) |
| OTT |
Over The Top (jargon) |
| OU |
Organisational Unit (org/itu/x500) |
| OWAMP |
One Way Active Measurement Protocol (org/ietf) |