Computer based information services available to the Australian community as of June 1977 are listed and described in this directory. The main section is a subject list providing information on 81 data bases, 26 of which are presently operating in Australia. The list is divided into 19 broad subject categories with a brief description, name, year begun, number of citations, availability, and publication information for each data base. American data bases are included. Additional sections include a directory of organizations providing access to data bases in Australia; an index to the subject list; and a list of information bulletins available from the Australian National Library. (Author/KP)