O

• OAI-PMH : Open Archives Initiative Protocol for Metadata Harvesting
  

  ---

• OAIster
  

  ---

• Obra huérfana
  

  ---

• Oceanic Abstratcs
  

  ---

• OCR : Optical Character Recognition
  

  ---

• OCLC : Online Computer Library Center
  

  ---

• OCW : OpenCourseWare
  

  ---

• Offsetting
  

  ---

• OJS : Open Journal System
  

  ---

• OPAC : Catálogo Público de Acceso en Línea
  

  ---

• OpenDOAR
  

  ---

• OpenGrey
  

  ---

• Osiris