OS -Operating System
OCR -Optical Character Recognition
OLED -Organic Light Emitting Diode
OOP -Object-Oriented Programming
OSI -Open Systems Interconnection
OTP -One Time Password
ODBC -Open Database Connectivity
OEM -Original Equipment Manufacturer
ODF -Open Document Format
OSS -Open Source Software
OLE -Object Linking And Embedding
OLTP -Online Transaction Processing
OLAP -Online Analytical Processing
OSINT -Open Source Intelligence
OIS -Optical Image Stabilization
ORM -Object Relational Mapping
OVA -Open Virtual Appliance
OVF -Open Virtualization Format
OSD -On-Screen Display
OSR -Operating System Resource
ODR -Online Dispute Resolution
OSPF -Open Shortest Path First
OWA -Outlook Web Access
ORDBMS -Object Relational Database Management System
OOPL -Object-Oriented Programming Language
OID -Object Identifier
OOB -Out Of Band
OMA -Open Mobile Alliance
ODM -Original Design Manufacturer
OCS -Office Communications Server
OSP -Outside Plant
OVS -Open VSwitch
OEL -Oracle Enterprise Linux
OSDP -Open Supervised Device Protocol
OQL -Object Query Language
OTS -Off-The-Shelf
OAD -Over-the-Air Download
OMM -Operations And Maintenance Module
OSDN -Open Source Development Network
OBC -On-Board Computer
OBE -Outcomes-Based Education
OIT -Office Of Information Technology
OOPS -Object-Oriented Programming System