title: Di
text: # Di
  
  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 (given name)
     * Diane (disambiguation)
     * Dianne (disambiguation)
  * 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
  