O&M: Operations and Maintenance
O/D: Origin / Destination
OBD: Onboard Diagnostics
OBE: On-Board Equipment
OBE-SP: On-Board Equipment Service Provider
OBM: On-Board Mass
OBU: Onboard Unit
ODD: Operational Design Domain
ODD: Operational Design Domain
OEM: Original Equipment Manufacturer
OER: Octet Encoding Rules
OIC: Officer in Charge
OMG: Object Management Group
ORDS: Object Registration and Discovery System
OSI: Open System Interconnect
OST-R: Office of the Secretary of Transportation for Research and Technology
OTA: Over the Air
OVW: Oversize Vehicle Warning