- Open ICT Ecosystem — An ICT ecosystem is open when it is capable of incorporating and sustaining Interoperability, collaborative development and transparency, while increasing capacities to create flexible, service-oriented ICT applications that can be taken apart and recombined to meet changing needs more efficiently and effectively.
- Open Science — Opening of the creation and dissemination of scholarly knowledge towards a multitude of stakeholders, from professional researchers to citizens
- Open Standard — A standard is open if meets the following criteria: All stakeholders have the same possibility of contributing to the development of the specification and public review is part of the decision-making process; The specification is available for everybody to study; Intellectual Property Rights related to the specification are licensed on FRAND (Fair, Reasonable, and Non-Discriminatory) or royalty-free terms in a way that allows implementation in both proprietary and open source software.
- Operational Level Agreement — Documented agreement between a service provider and another part of the service provider’s organisation or a federation member to provide a service component or subsidiary service needed to allow provision of services to customers
- Operational Target — Reference / target value for a parameter used to measure the performance of a service component, listed in an operational level agreement (OLA) or underpinning agreement (UA) related to this service component
- Operations Centre — A centre offering operations services on behalf of one or more Resource Infrastructure Providers.