 | O'Brien Effect |
 | Obeya |
 | Object |
 | Object Data Management Group (ODMG) |
 | Object Description |
 | Objective |
 | Objective Evidence |
 | Objectivity |
 | Object Management Group (OMG) |
 | Object Orientation (OO) |
 | Object-Oriented Database Management System (ODBMS) |
 | Object-Process Methodology (OPM) |
 | Object Technology |
 | Obliterator |
 | Observation |
 | Observation Domain Model |
 | Observation Model |
 | Occupant |
 | Occupant (Resident) Lists |
 | Occupant Address |
 | Occupational surname |
 | Occurrence |
 | Occurrence of record |
 | OCR Read Area |
 | Offer |
 | Officer in Charge (OIC) |
 | Offices |
 | Office Time |
 | Official Mail |
 | Official Mail Accounting System (OMAS) |
 | Official Personnel Folder (OPF) |
 | Offshore Outsourcing |
 | Offshoring |
 | OGC Interoperability Program |
 | OLAP Browser |
 | OLAP Client |
 | OLAP Services |
 | OLAP System |
 | OnDemand |
 | On-demand Interpretation (ODI) |
 | One Piece Flow |
 | One-Shot Mailing |
 | One-Time Buyer |
 | One-Time Password |
 | One-Time Password Specifications (OTPS) |
 | One-Time Use |
 | One-to-many Relationship |
 | One-to-One Marketing |
 | One-to-one Relationship |
 | One-Up Labels |
 | One-Year Contract |
 | Ongoing Process Capability |
 | Online |
 | On-Line Analytical Processing (OLAP) |
 | On-line Availability |
 | On-Line File Maintenance (OFM) |
 | Online Machine Translation |
 | On-Line Query |
 | On-line Transaction Processing (OLTP) |
 | On-site Interpretation |
 | On-Site Meter Setting |
 | On-the-Clock / Off-the-Clock |
 | Ontology |
 | Open Architecture |
 | Open Database Connectivity (ODBC) |
 | OpenGIS |
 | OpenGIS Abstract Specification |
 | OpenGIS Implementation Specification |
 | OpenGIS Reference Model (ORM) |
 | OpenGIS Specification |
 | Opening Unit |
 | Open Interface |
 | Open Lexicon Interchange Format (OLIF) |
 | Open Location Services |
 | Open Mobile Alliance (OMA) |
 | Open Platform |
 | Open Rate |
 | Open Source |
 | Open-Source Software |
 | Open Specification |
 | Open Standard |
 | Open System |
 | Open System Environment |
 | Open Transit |
 | Operating Characteristic Curve (OC Curve) |
 | Operating System |
 | Operation |
 | Operational Consolidation |
 | Operational Cost |
 | Operational Data |
 | Operational Database |
 | Operational Data Source |
 | Operational Data Store / Datastore (ODS) |
 | Operational Definition |
 | Operational information steward |
 | Operational Metadata |
 | Operational Performance |
 | Operational Processing |
 | Operational Systems |
 | Operation Cost Target (OCT) |
 | Opinion |
 | Opportunity |
 | Opportunity Creation |
 | Opportunity Seeker |
 | Optical Character Reader (OCR) |
 | Optical character recognition (OCR) |
 | Optimization |
 | Optimize |
 | Optimized Data |
 | Optimum |
 | Opt-in |
 | Optional Endorsement Line (OEL) |
 | Optional Procedure Mailing System (OP) |
 | Opt-out |
 | Or Current Resident |
 | Order |
 | Order Entry Procedure |
 | Order Form |
 | Order Margin |
 | Ordinal Data |
 | Ordinal Data Type |
 | Ordinary |
 | Ordinary Mail |
 | Organic Search Listings |
 | Organization |
 | Organization's Environment |
 | Organizational Change Management |
 | Organizational Culture |
 | Organizational Intelligence |
 | Organization for the Advancement of Structured Information (OASIS) |
 | Organization Structure |
 | Original Entry |
 | Original Equipment Manufacturer (OEM) |
 | Original Mailing Office |
 | Originating Mail |
 | Origination |
 | Origin Bulk Mail Center (OBMC) Presort Rate |
 | Origin Destination Information System (ODIS) |
 | Origin Facility |
 | Orthophoto Map |
 | Orthorectification |
 | Other Articles (AO) |
 | Outer Join |
 | Outgoing Calls |
 | Outgoing Mail |
 | Outlier |
 | Out-of-Control Process |
 | Out of Spec |
 | Output |
 | Outputs |
 | Outsert |
 | Outside |
 | Outside Parcel |
 | Outsource |
 | Outsourced Process |
 | Outsourcing |
 | Overage |
 | Overall Equipment Effectiveness (OCT) |
 | Over-Carry |
 | Overflow Tray |
 | Overlay |
 | Overlays |
 | Overloaded data element |
 | Overnighter, The |
 | Oversized Rate |
 | Over-the-Phone Interpretation |
 | Over-the-Road Container (OTR) |
 | Owners |
 | Owner Service Bureau |
 | Ownership |
 | OWS Service Framework |