An international nuclear information system (INIS) which applies computer techniques to the management of the world's nuclear literature is about to come into operation. This prompted the International Atomic Energy Agency to hold a symposium to provide a comprehensive review of the facilities and services available in the world for providing information to nuclear scientists and engineers. The symposium was attended by 168 participants from 31 countries and 12 international organizations. A total of 57 papers was presented. The broad subjects covered by the nine sessions are: (1) national and institutional information centers; (2) specialized information centers; (3) information services: manual, mechanized and computerized; (4) information services: computerized (contd.); (5) primary publications; (6) secondary publications; (7) nuclear libraries and services; (8) indexing methods and systems and (9) world-wide cooperation in scientific information. English language abstracts are provides for all of the papers. The sessions chairmen, list of participants and an author index are also included. (NH)