In part A (II) the uniqueness theorem for equivariant cohomology theories, (proved in part A (I)), is used to calculate the operation rings, Op(KG,KG^) and OP(KG^,KG^), (^ is I(G)adic completion ; G is a finite group). Semigroups, SG < KG, are introduced and Op(~SG(), KG) is calculated in order to investigate (Op(KG), the ring of selfoperations of KG. Finally Op(KG) is related to the other two rings of operations and any selfoperation of KG is proved to be continuous with respect to the I(G)adic topology. In Part B some higher order operations in Ktheory, called Massey products, are defined and proved to be the differentials in the Equivariant Kunneth Formula spectral sequence in Ktheory. In Part C the RothenbergSteenrod spectral sequences are used (i) to calculate the Ktheory of conjugate bundles of Lie groups, (ii) to prove a small theorem on the Ktheory of homogeneous spaces of Lie groups, and (iii) to calculate the homological dimension of R(H) as an R(G)module, for an inclusion of Lie groups, H
