In general, differences in composition and structure may exist between the bulk and 'real' surface, or near surface region, of a multicomponent glass. These differences are due to high temperature surface chemical phenomena which occur during the formation and cooling of a melt glass surface, as well as to surface chemical reactions under ambient conditions. This is in contrast to an 'ideal' glass surface whose composition and structure are identical to the bulk. It is likely that ideal glass surfaces can be created only by fracturing bulk, homogeneous, microstructure-free glass in an ultra-high environment. The chemical properties of some 'real' and 'ideal' glass surfaces will be discussed and related to macroscopic properties including dynamic fatigue and the peel strength of laminated composites.