The OS currently has 19 members, which are:
Members
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S.A. Astatine 
S.A. Atlantis S.A. Communiqué ConcepT 
S.G. Daedalus Dimensie W.T.S. Ideefiks
I.C.T.S.V. Inter-Actief
Komma
W.S.G. Isaac Newton
Onwijs
S.V. Paradoks
S.A. Proto
E.T.S.V. Scintilla
Sirius
S.V. Stress