Logos
- Ocko
- ocko
- OCL
- OCL
- OCLC
- OCLC
- OCLI
- OCLV Carbon
- OCLV Carbon
- OCM CLIMA S.r.l.
- OCMW Langemark
- OCMW Vlaanderen
- OCN
- OCN
- OCN Credit4Learning
- Ocna Optika
- OCnow
- OCOIT
- OCOS
- Ocozzio Inc.
- OCP
- OCP
- OCP
- OCP
- OCP - Robocop
- Ocqueteau
- OCR
- OCRE
- OCS
- OCS Think Done
- OCSN
- Octa
- OCTA
- OCTA Concept
- OctaBond
- Octagon
- Octagon Cafe Bistro
- Octagono Bienes Raices
- Octan Lego
- Octane Fitness
- Octanorm
- Octanorm OSPI
- Octanorm Vertriebs GmbH
- Octasic Semiconductor
- Octave Marketing
- Octavia
- Octek
- Octel
- Octel
- octepmex