Describes the broad scope of publications and information content in both printed and computer-readable versions of Chemical Abstracts Service Source Index (CASSI), including special characteristics, growth rates, and the use of CASSI as a union list. A discussion of the uses of CASSI which are possible through searching the computer-readable file…

The history of "The Engineering Index" (Ei) and its parent organization, Engineering Information, Inc., is traced from 1884-1984, drawing parallels between the 100-year evolution of Ei and the 75-year development of Special Libraries Association. Ei's future plans for expansion are defined with emphasis given to special librarian's role.…

The low rate of relevant titles (fewer than 50 percent) retrieved by online searching of keywords in titles in study conducted at the Mechanized Information Center, Ohio State University, is attributed to three sources: titles themselves, user ignorance of subject vocabulary, and general language problems. Eight references are cited. (EJS)