Conjugation of Ø̄

O o

O.A.S. O.C.R. O.G.M. O.N.G. O.N.U. O.P. O.P.A. O.P.E. O.P.H.L.M. O.R.L O.R.L. O.S. O.T.A.N. O.T.A.S.E. O.V.N.I.