Computing, internet and IT

• Files-11
  Files-11
  Files-11, also known as on-disk structure, is the file system used by Hewlett-Packard's OpenVMS operating system, and also by the older RSX-11...
  
   (On-Disk Structure), a DEC filesystem
• OpenDocument
  OpenDocument
  The Open Document Format for Office Applications is an XML-based file format for representing electronic documents such as spreadsheets, charts, presentations and word processing documents....
  
   OpenDocument Spreadsheet file format
• OpenLink Data Spaces, A software product from OpenLink Software
• Online dating service
  Online dating service
  Online dating or Internet dating is a dating system which allows individuals, couples and groups to make contact and communicate with each other over the Internet, usually with the objective of developing a personal, romantic, or sexual relationship...
  
  
• Output Delivery System, a feature of the SAS System
• Operational data store
  Operational data store
  An operational data store is a database designed to integrate data from multiple sources for additional operations on the data. The data is then passed back to operational systems for further operations and to the data warehouse for reporting....
  
  , an intermediate data warehouse for databases
• Open Domain System
• OpenDNSSEC
  OpenDNSSEC
  The OpenDNSSEC is software that manages the security of domain names on the Internet. The project intends to drive adoption of Domain Name System Security Extensions to further enhance Internet security....
  
  , a security extension of DNS Protocol
• Optical data storage a technology for storing information
• On Demand Scan used in software product McAfee virus Scan

Science and technology

• Octadecylsilane, also known as C18, a surface coating used in reversed-phase chromatography
  Reversed-phase chromatography
  Reversed-phase chromatography includes any chromatographic method that uses a non-polar stationary phase. The name "reversed phase" has a historical background. In the 1970s most liquid chromatography was done on non-modified silica or alumina with a hydrophilic surface chemistry and a stronger...
  
  
• Oxide dispersion strengthened alloys
• Ozone-depleting substance, chemicals which contribute to ozone depletion

Other

• The Civic Democratic Party (Czech: Občanská demokratická strana)
• Odessa Airport
  Odessa Airport
  Odesa International Airport is an airport located southwest from the centre of Odessa, Ukraine, sometimes called "Odesa Central" ....
  
   , an airport in Odessa, Ukraine
• L'Officiel du jeu Scrabble
  L'Officiel du jeu Scrabble
  L'Officiel du jeu Scrabble has been the official dictionary for Francophone Scrabble since January 1, 1990. It is published by Larousse and is often abbreviated to ODS...
  
  , the reference dictionary for Scrabble in French-speaking countries
• One Day School, a gifted education program in New Zealand.
• Operational Deflection Shape
• Optimum Delivery Systems, a shipping & fuel efficiency Research company
• Optimus Design Systems
  Optimus Design Systems
  Optimus Design Systems was a small publisher of role-playing games , based in Buffalo, New York. The company produced two products, the Battlelords of the 23rd Century science-fiction role-playing game, and the Blood Dawn post-apocalyptic RPG. ODS produced the first of several editions of...
  
  , a former publisher of roleplaying games
• Overdoses (especially drug overdoses)
• In Liverpool in England, Old Dock Sill
• Orbital Dysfunctional Syndrome from the film Pandorum
  Pandorum
  Pandorum is a 2009 German-British science fiction thriller film written by Travis Milloy, directed by Christian Alvart and produced by Paul W.S. Anderson. The film stars Dennis Quaid and Ben Foster. Filming began in Berlin in August 2008. Pandorum was released on September 25, 2009 in the United...