Di or DI may refer to:
Arts and media
Music
- Di, a tone in the solfège ascending chromatic scale existing between Do and Re
 - dizi (instrument) or di, a Chinese transverse flute
 - D.I. (band), a punk band from Southern California
- D.I. (EP), a 1983 EP by the same band above
 
 
Other media
- The D.I., 1957 military film by Jack Webb
 - Dagens Industri, a Swedish financial newspaper
 - DI.FM, an internet radio service
 
Businesses and organisations
- Defence Intelligence, a UK military intelligence agency
 - Defensa Interior, an anti-Franco militant anarchist group in 1960s Spain
 - Deseret Industries, an LDS thrift store
 - Desert Inn, a former casino in Las Vegas
 - Direction Italy, a liberal-conservative political party in Italy
 - Dirgantara Indonesia, an Indonesian aircraft company
 - Discovery Institute, an intelligent design advocacy group
 - Norwegian Air UK, a UK based airline (IATA designator)
 - DynCorp International, a major United States defense contractor
 - Myanmar Directorate of Defence Industries
 
Education
- Diplomi-insinööri, a Finnish 6-year engineering degree
 - Direct instruction, an instructional method focused on a systematic curriculum design
 
Natural sciences
- Di, a prefix used in organic chemistry nomenclature
 - Didymium, a mixture of the elements praseodymium and neodymium once thought to be an element
 - Diopside, a clinopyroxene mineral
 - Band 3, a protein
 - Deionized water, a type of water deprived of the dissolved impurities of ionic nature
 - Diabetes insipidus, a disease
 - Iodothyronine deiodinase type I, one of a subfamily of enzymes important in the activation and deactivation of thyroid hormones
 - Dentinogenesis imperfecta a genetic disorder of tooth development
 
People
Ethnic groups
- Di (Five Barbarians) (氐), an ethnic group that overran northern China during the Sixteen Kingdoms period
 - Beidi or Northern Di (狄), ethnic groups living in northern China during the Zhou Dynasty
 
Individuals
- Di (surname) (狄), a Chinese surname sometimes also romanized Dee, particularly:
- Di Renjie a Tang-dynasty official later fictionalized in a series of Chinese detective stories
 
 - A diminutive form of the names:
 - Diana, Princess of Wales (1961–1997), commonly known as Princess Di or Lady Di
 
Technology
- Digital intermediate, a filmmaking post-production process
 - Dependency injection, a method of decoupling components in software
 - DI unit or Direct Input box, an audio device used with PA systems and in sound recording studios
 - DI register, or destination index, in x86 computer architecture
 - Direction indicator, an instrument in aviation also known as a heading indicator
 - Direct ignition, see Distributor § Direct ignition
 - Direct injection, a type of fuel injection
 
Religion
- di (帝), a Chinese word employed in
- the temple names of deified Chinese emperors
 - Shangdi (Chinese: 上帝, lit. "Lord on High"), the Chinese name for the supreme sky god either in native Chinese beliefs or in translation of monotheistic faiths like Christianity and Islam
 
 - di (Chinese concept) (地), the concept of "earth" in traditional Chinese cosmologies
 - di, an irregular Latin masculine plural of deus ("god", "deity")
 
Other uses
- Detective Inspector, a rank in certain police forces
 - Di (cuneiform), an ancient written sign
 - Diameter, the distance across the middle of a circle
 - Di Department, one of the eight departments of the Sourou Province in Burkina Faso
 - 501 (number) in Roman numerals
 - Disability insurance, a form of insurance that insures the beneficiary's earned income against the risk that a disability will make working uncomfortable
 - Hong Kong Document of Identity, issued by the Hong Kong Immigration Department
 - Drill instructor, a non-commissioned officer in many military or police forces
 - Differentiated integration, a mechanism for the European Union's countries to opt out of EU policies
 
See also
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