| IJA | I J Array 
| Others |
| IJA | I Jump Anyone
| Others |
| IJA | Ida Jew Academies
| Others |
| IJA | Idaho Japanese Association
| Others |
| IJA | Illinois Judges Association
| Others |
| IJA | Imperial Japanese Army
| Others |
| IJA | Indian J
| Others |
| IJA | Indian Journal of Anaesthesia
| Others |
| IJA | Institute of Judicial Administration
| Others |
| IJA | International Journal of Advertising
| Others |
| IJA | International Journal of Agronomy
| Others |
| IJA | International Journal Of Algebra
| Others |
| IJA | International Journal of Archaeology
| Others |
| IJA | International Journal of Astrobiology
| Others |
| IJA | International Journal of Audiology
| Others |
| IJA | International Jousting Association
| Others |
| IJA | International Judges Association
| Others |
| IJA | International Judicial Academy
| Others |
| IJA | International Juggler's Association
| Others |
| IJA | International Jugglers Association
| Others |
| IJA | International Jugglers' Association
| Others |
| IJA | Internet Juggling Association
| Others |
| IJA | Iraqi Jewish Archive
| Others |
| IJA | Ireland Japan Association
| Others |
| IJA | Irish Judo Association
| Others |
| IJA | Iron Jawed Angels
| Others |