Big Ben Club
Computers, Systems, RISC OS, User Groups - Big Ben Club. National Acorn/RISC OS computer group of the Netherlands.
https://www.bigbenclub.nl/
The ARM Club
Computers, Systems, RISC OS, User Groups - The ARM Club. The ARM Club is the main usergroup for users of RISC OS machines.
https://www.armclub.org.uk/
AAUG: Association of Acorn User Groups
Computers, Systems, RISC OS, User Groups - AAUG: Association of Acorn User Groups. Umbrella organisation, with the aim to increase channels of communication between user groups and businesses.
https://www.aaug.net/