The first section of this precis summarizes the general nature of the present chemical information systems of the world. The discussion is presented in four parts: (1) the primary literature, (2) secondary sources and services, (3) libraries and information centers and (4) other elements categorized as informal communications. The second section presents material on advanced developments by discussing some facets of computer-assisted publication and presenting brief descriptions of four systems which use or will use computers in handling scientific information. Problems encountered by chemical information systems in trying to provide access to needed information to their users and some suggested solutions to these problems are discussed in the final section. (Author/NH)