Di

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

• 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
• Marabu (airline) (IATA code: DI), an Estonian leisure airline
• Norwegian Air UK (former IATA code: DI), a former UK airline
• DBA (airline) (former IATA code: DI), a former German low-cost airline
• DynCorp International, a major United States defense contractor
• Myanmar Directorate of Defence Industries

• Diplomi-insinööri, a Finnish 6-year engineering degree
• Direct instruction, an instructional method focused on a systematic curriculum design

• 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

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

• 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

• 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")

• Detective inspector (DI), 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