INIS represents a wealth of experience and an extensive pool of information in the nuclear field. The first INIS output products, the printed Atomindex and associated magnetic tapes, were issued in April 1970. INIS has since grown into one of the most successful and comprehensive information systems on the peaceful uses of nuclear science and technology.
| 1966 | International system proposed |
| 1967 | INIS Secretariat established |
| 1969 | IAEA Board of Governors approved the system |
| 1970 | First products generated in printed and electronic forms |
| 1970 | INIS membership comprises 39 Member States and 11 international organizations |
| 1970 | First training course held |
| 1971 | INIS Thesaurus developed and adopted for documents indexing |
| 1973 | Full subject scope covered |
| 1976 | Abstracts added to references |
| 1977 | 100 000 NCL full texts on microfiche available |
| 1978 | INIS Database accessible on traditional online system |
| 1979 | French INIS Thesaurus completed |
| 1981 | Russian INIS Thesaurus completed |
| 1982 | German INIS Thesaurus completed |
| 1983 | INIS Multilingual Dictionary (English-French-German-Russian) completed |
| 1985 | First definition of Membership Arrangements distributed |
| 1985 | 250 000 NCL full texts on microfiche available |
| 1986 | One million database references available |
| 1990 | Expert system for indexing quality control implemented |
| 1990 | Input preparation software FIBRE introduced |
| 1991 | INIS Database available on CD-ROM |
| 1992 | Expansion of subject scope to include the environmental and economic aspects of non-nuclear energy sources |
| 1993 | Routine receipt of input to the system by electronic mail |
| 1994 | Definition of membership arrangements |
| 1994 | INIS Mission Statement revised |
| 1994 | Spanish INIS Thesaurus completed |
| 1995 | INIS Multilingual Dictionary (English-French-German-Russian-Spanish) completed |
| 1996 | INIS Web Site launched |
| 1996 | 500 000 NCL full texts on microfiche available |
| 1997 | Two million database references available |
| 1997 | New electronic technology implemented, and INIS NCL full texts available on CD-ROM; Start of electronic document delivery service |
| 1997 | INIS computer based training package on CD-ROM released |
| 1998 | INIS Database on Internet launched |
| 1998 | INIS Data Processing System launched (all processing done on-line) |
| 2000 | INIS Web services launched |
| 2000 | INIS Distance Learning Program on Internet launched |
| 2000 | Definition of membership arrangements revised |
| 2004 | INIS2 - a regional portal site - opened at the Korean Atomic Energy Research Institute (KAERI) |
| 2004 | INIS given new role in nuclear knowledge preservation and management |
| 2004 | Computer-assisted indexing (CAI) system started in the INIS Secretariat |
| 2004 | Two and a half million database references available |
| 2005 | INIS 35th anniversary (1970-2005) |
| 2006 | INIS membership comprises 116 Member States and 22 international organizations |
| 2006 | INIS Database includes 2.7 million bibliographic references and about 700 000 full-text documents |
| 2008 | Three million bibliographic references available on the INIS database |
| 2008 | INIS Database Open Access Pilot Project launched in seven countries |
| 2009 | Free, open and unrestricted access to the INIS database available to Internet users around the world |