  We show that any topological toric manifold can be covered by finitely many
open charts so that all the transition functions between these charts are
Laurent monomials of $z_j$'s and $\bar{z}_j$'s. In addition, we will describe
toric manifolds and some special class of topological toric manifolds in terms
of transition functions of charts up to (weakly) equivariant diffeomorphism.
