Similar to Software_Package_Data_Exchange

• 

  OpenMosix

  OpenMosix
  
• 

  OpenRC

  OpenRC
  
• 

  OpenRefine

  OpenRefine
  
• 

  OpenServer

  OpenServer
  
• 

  Optics Express

  Optics Express
  
• 

  Optics Letters

  Optics Letters
  
• 

  Orca

  Orca (assistive technology)
  
• 

  ORCA (量子化学プログラム)

  ORCA (quantum chemistry program)
  
• 

  ORCID

  ORCID
  
• 

  Otter (ソフトウェア)

  
• 

  PAOKテッサロニキ

  PAOK FC
  
• 

  PDFtk

  PDFtk
  
• 

  PDRM FC

  Polis Diraja Malaysia FC