Let B denote the vector space
of bounded analytic functions on the open unit disc. The first part of this
paper involves the use of three topologies on B which give rise to various
continuity classes of operators from B to B, and the study of the relationships
among these classes. The second is the examination of a special class of
operators called multipliers. An operator T is a multiplier if for some sequence
cn, we have T(∑anzn) =∑ancnzn for any function ∑anzn in B. We
characterize all the multipliers from B into B and study their continuity
properties.