It became evident during a number of discussions with the NREN community that there were different usages and understanding of various terms in the context of orchestration, automation and virtualisation (OAV). As a result, a Focus Group (FG) on ‘Terminology’ was established in GN4-3/WP6 to identify a list of relevant OAV terms and acronyms and provide short definitions for these terms. It was agreed that the definitions should be based on documents of standardisation bodies whenever possible. In all other cases the FG provided definitions based on internal discussions and surveys within the WP6-T2 consensus building team. The work was concluded with a document (pdf) that can serve as a guideline to members of the community in the ongoing effort to find commonalities and strategic visions for further OAV-work in GÉANT. All terms can also be found at OAV Terminology.