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 The Iceland Defense Force ( is, Varnarlið Íslands; IDF) was a military command of the United States Armed Forces from 1951 to 2006. The IDF, created at the request of NATO, came into existence when the United States signed an agreement to prov ...

, 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. Lik ...

, a part-time force, 1917

Organizations

Israeli Diving Federation Israeli Diving Federation ( he, ההתאחדות הישראלית לצלילה, Hitahdut Haisraelit Letslila) (TIDF) is a non-governmental SCUBA diving training organization based in Israel. History The Gulf of Eilat is one of the most popular ...

Interaction Design Foundation The Interaction Design Foundation (IxDF) is an educational organization which produces open access educational materials online with the stated goal of "democratizing education by making world-class educational materials free for anyone, anywhere." ...

International Diabetes Federation The International Diabetes Federation (IDF) is an umbrella organization of over 230 national diabetes associations in more than 160 countries and territories. The Federation has been leading the global diabetes community since 1950. It is headqua ...

International DOI Foundation A digital object identifier (DOI) is a persistent identifier or handle used to uniquely identify various objects, standardized by the International Organization for Standardization (ISO). DOIs are an implementation of the Handle System; they a ...

, 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 This is a list ...

, Idiofa, Democratic Republic of the Congo (IATA airport code) *

Île-de-France , timezone1 = CET , utc_offset1 = +01:00 , timezone1_DST = CEST , utc_offset1_DST = +02:00 , blank_name_sec1 = Gross regional product , blank_info_sec1 = Ranked 1st , bla ...

, region of France

Other uses

Intensity-duration-frequency curve An intensity-duration-frequency curve (IDF curve) is a mathematical function that relates the rainfall intensity with its time, duration and return period, frequency of occurrence. These curves are commonly used in Hydrological modelling, hydrology ...

, for rainfall *

Intel Developer Forum The Intel Developer Forum (IDF) was a biannual gathering of technologists to discuss Intel products and products based on Intel products. The first IDF was held in 1997. To emphasize the importance of China, the Spring 2007 IDF was held in Beiji ...

Intermediate Data Format Intermediate Data Format (IDF) files are used interoperate between electronic design automation (EDA) software and solid modeling mechanical computer-aided design (CAD) software. The format was devised by David Kehmeier at the Mentor Graphics C ...

, 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 fr ...

, for telecommunications wiring *

AIDC F-CK-1 Ching-kuo The AIDC F-CK-1 Ching-Kuo (), commonly known as the Indigenous Defense Fighter (IDF), is a multirole combat aircraft named after Chiang Ching-kuo, the late President of the Republic of China. The aircraft made its first flight in 1989. It ente ...

, Indigenous Defense Fighter, Taiwanese aircraft *Inverse Document Frequency, a factor in the

tf–idf In information retrieval, tf–idf (also TF*IDF, TFIDF, TF–IDF, or Tf–idf), short for term frequency–inverse document frequency, is a numerical statistic that is intended to reflect how important a word is to a document in a collection or co ...

principle *

Indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim by ...

(''see also'' Glossary of military abbreviations#I)