Politicians in EU and US call various institutions a "NGO" when they disagree with it and want to ridicule it to intentionally reduce its public reputation.

EP is a high reputation organization and has force within the EU structure. Calling an EPRS study "something by the parliament's research service" is not only redundant (EPRS = European Parliament Research Service) but also short-sighted (do you do the same thing to the deliverables by your R&D department?).

So, this is an EP study that you can cite in order to support your arguments for switching to free software in your government / school / workplace / home / hobby group.