Occupational Education Project
Occupational Exploration Program (OICC)
Ocean Education Project (EA)
Octaethylporphine (SAUS)
Octaethyl Porphyrin (SAUS)
Odd-Even Predominance - Organic chemistry
Office of Economic Planning (SAUS)
Office of Economic Policy (SAUS)
Office of Economic Preparedness
Office of Economic Programs - of BDSA
Office of Emergency Planning (AD)
Office of Emergency Preparedness - formerly, Planning - Terminated, 1973
Office of Energy Planning (COE)
Office of Energy Programs - NASA
Office of Enforcement Policy (SAUS)
Office of Environmental Policy - White House - Marine science
Office of External Programs - Environmental Protection Agency (GFGA)
Office of Extramural Programs (MELL)
Officer Education Program (SAUS)
Oil-Extended Polymer (IAA)
Open-Ended Plan - Human resources (WYGK)
Open Experimental Platform
Operand Execution Pipeline - Computer science
Operational Employment Plan - Army
Optional Educational Programs (AD)
Optoelectronic Packaging (SAUS)
Organization, Education and Personnel (SAUS)
Original Element Processor (MHDB)
Outside Engineering Personnel (MCD)
Overall Economic Perspective (SAUS)
Overseas Employment Program - DoD
Owen Electric Pictures - Telecommunications service (TSSD)
Preble County District Library, Eaton, OH - Library symbol - Library of Congress (LCLS)
Seaton Marine LLC, Newport, RI - Manufacturer code for watercraft hull identification number (USCG)
United States Environmental Protection Agency, Cincinnati (SAUS)