Before revision: Operational Displays Systems are usually being developed by large countries' civil aviation authorities (such as the Federal Aviation Administration in the USA, or Eurocontrol in Europe), with inputs from technology companies and air traffic controllers associations.
After revision: the main Service Providers in Europe, such as DFS, NATS, DSNA, AENA, MUAC, etc, coordinated byOperational Displays Systems are usually being developed by large countries' civil aviation authorities (such as the Federal Aviation Administration in the USA, or Eurocontrol in Europe), with inputs from technology companies and air traffic controllers associations.