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3,700 companies
Olmsted Brothersarchitectural firm, landscape architectural firm
Omni Air Internationalairline
Omnicom Groupadvertising agency, business, public company
On2 TechnologiesbusinessOne America News Networknews website, television channel, organization, subscription television, cable news in the United StatesOne Race Filmsenterprise
ONErpmrecord label, music distributor, business
Oneworldairline alliance, businessOni Presscomics publishing company, book publisher
Onsemibusiness, enterprise, public company
Open Invention Networkbusiness, enterpriseOpen Road Flimsfilm production company, film distributor
OpenAIenterprise
OpenDNSservice on Internet, public recursive name server, business
Opticaassociation, open-access publisher, scientific society, academic publisher
OQObusiness, enterprise
Oracle Corporationbusiness, public company
Oral Roberts Universitychurch college, private not-for-profit educational institution, university
Orbcommbusiness, public company
Orbital ATKlaunch service provider, former entity, defense contractor, aerospace manufacturerOrbital Sciences Corporationlaunch service provider, enterprise, public company, aerospace manufacturer
Oregon Health and Science Universitypublic educational institution of the United States, public university
Oregon Institute of Technologyuniversity of technology, public educational institution of the United States
Oregon State Universityresearch university, sea grant institution, space grant institution, public educational institution of the United States, land-grant university, public research university, sun grant institution, public university
Organon & Co.organization, business, public companyOrigin Systemsvideo game publisher, video game developer
Original Filmfilm production company
Orion Picturesfilm production company, business
Orpheum Theatretheatre building, movie theater, music venue
Osborne Computer Corporationbusiness
Oscar Mayerbusiness
Oshkosh Corporationbusiness, enterprise, public company
OTC Markets Groupinter-dealer quotation system, stock exchange, public companyOTCBBstock exchange, business
Otis Worldwide Corporationbusiness, public company
Outerbanks Entertainmenttelevision production company, film production companyOverbrook Entertainmentbusiness
Overland Automobilebusiness, automobile manufacturer
Ovintivpublic company
Owens Corningbusiness, public company
Owens-Illinoisorganization, business, enterprise, public company
O’Reilly Mediabook publisher, publishing house
P. F. Chang's China Bistrorestaurant chainP.A. Semibusiness
PACCARcommercial vehicle manufacturer, enterprise, public company
Pace Universityprivate not-for-profit educational institution, university
Pacific Data Imagesbusiness
Pacific Gas and Electric Companypublic company
Omni Air InternationalairlineOmnicom Groupadvertising agency, business, public companyOn2 TechnologiesbusinessOne America News Networknews website, television channel, organization, subscription television, cable news in the United StatesOne Race FilmsenterpriseONErpmrecord label, music distributor, businessOneworldairline alliance, businessOni Presscomics publishing company, book publisherOnsemibusiness, enterprise, public companyOpen Invention Networkbusiness, enterpriseOpen Road Flimsfilm production company, film distributorOpenAIenterpriseOpenDNSservice on Internet, public recursive name server, businessOpticaassociation, open-access publisher, scientific society, academic publisherOQObusiness, enterpriseOracle Corporationbusiness, public companyOral Roberts Universitychurch college, private not-for-profit educational institution, universityOrbcommbusiness, public companyOrbital ATKlaunch service provider, former entity, defense contractor, aerospace manufacturerOrbital Sciences Corporationlaunch service provider, enterprise, public company, aerospace manufacturerOregon Health and Science Universitypublic educational institution of the United States, public universityOregon Institute of Technologyuniversity of technology, public educational institution of the United StatesOregon State Universityresearch university, sea grant institution, space grant institution, public educational institution of the United States, land-grant university, public research university, sun grant institution, public universityOrganon & Co.organization, business, public companyOrigin Systemsvideo game publisher, video game developerOriginal Filmfilm production companyOrion Picturesfilm production company, businessOrpheum Theatretheatre building, movie theater, music venueOsborne Computer CorporationbusinessOscar MayerbusinessOshkosh Corporationbusiness, enterprise, public companyOTC Markets Groupinter-dealer quotation system, stock exchange, public companyOTCBBstock exchange, businessOtis Worldwide Corporationbusiness, public companyOuterbanks Entertainmenttelevision production company, film production companyOverbrook EntertainmentbusinessOverland Automobilebusiness, automobile manufacturerOvintivpublic companyOwens Corningbusiness, public companyOwens-Illinoisorganization, business, enterprise, public companyO’Reilly Mediabook publisher, publishing houseP. F. Chang's China Bistrorestaurant chainP.A. SemibusinessPACCARcommercial vehicle manufacturer, enterprise, public companyPace Universityprivate not-for-profit educational institution, universityPacific Data ImagesbusinessPacific Gas and Electric Companypublic company