IDF or idf may refer to:

Defence forces

Irish Defence Forces The Defence Forces ( ga, Fórsaí Cosanta, officially styled ) derives its origins from the Irish Volunteers. Whilst the Irish for ''Defence Forces'' is , as Ó Cearúil (1999) points out, the Defence Forces are officially styled . is used in ...

Israel Defense Forces The Israel Defense Forces (IDF; he, צְבָא הַהֲגָנָה לְיִשְׂרָאֵל , ), alternatively referred to by the Hebrew-language acronym (), is the national military of the Israel, State of Israel. It consists of three servic ...

* Iceland Defense Force, of the US Armed Forces, 1951-2006 *

Indian Defence Force The Indian Defence Force (IDF) was a part-time defence force established as part of the Indian Army in 1917 in order to release regular troops from garrison duties during the First World War. It was divided into British and Indian sections. L ...

, a part-time force, 1917

Organizations

* Israeli Diving Federation * Interaction Design Foundation * International Diabetes Federation * International DOI Foundation, of the digital object identifier

Places

Idiofa Airport Idiofa Airport is an airport serving Idiofa, a city in Kwilu Province, Democratic Republic of the Congo. See also * * * Transport in the Democratic Republic of the Congo * List of airports in the Democratic Republic of the Congo References ...

, Idiofa, Democratic Republic of the Congo (IATA airport code) * Île-de-France, region of France

Other uses

* Intensity-duration-frequency curve, for rainfall * Intel Developer Forum *

Intermediate Data Format Intermediate Data Format (IDF) files are used interoperate between electronic design automation (EDA) software and solid modeling mechanical computer-aided design Computer-aided design (CAD) is the use of computers (or ) to aid in the creat ...

, a file format for electronic design automation *

Intermediate distribution frame An intermediate distribution frame (IDF) is a distribution frame in a central office or customer premises, which cross connects the user cable media to individual user line circuits and may serve as a distribution point for multipair cables f ...

, for telecommunications wiring * AIDC F-CK-1 Ching-kuo, Indigenous Defense Fighter, Taiwanese aircraft *Inverse Document Frequency, a factor in the tf–idf principle * Indirect fire (''see also'' Glossary of military abbreviations#I)