

Operational Readiness Float


orifice


open reading frame


Owner's Risk of Fire


Office of Research Facilities


Operational Reserve Force


Orbital Reference Frame

IATA code for Norfolk International Ai…

Oberhausen Rotor Furnace

Observer Research Foundation

Oceanic Resource Foundation

Official Representation Fund

Oklahoma Research Foundation

Oman Royal Flight

Ontario Research Foundation

Ontario Research Fund

open read frame

open reading flame

open reading fragment

open reading frames

Operational Readiness Floats

Operations Research and Facilities

Oral Reading Fluency

Ortho Research Foundation

Outbound Route Filtering

Outpatient Rehabilitation Facility

Output Related Funding

Open Reintegration Fund