DI

DI, the two-letter abbreviation, has a number of meanings:

Natural Sciences

• Band 3, a protein
• Deionized water (DI water), a type of water deprived of the dissolved impurities of ionic nature
• Discovery Investigations, a series of scientific cruises and shore-based investigations into the biology of whales in the Southern Ocean
• Diabetes insipidus, a disease

Technology

• Digital intermediate, a filmmaking post-production process
• Damage indicator, a parameter used to assess damages
• 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
• Digitally Imported, an internet radio service
• DI register, or destination index, in X86 computer architecture
• Direction Indicator, an instrument in aviation also known as a Heading indicator
• Direct Injection, a type of fuel injection

Companies/Organisations

• Deseret Industries, an LDS thrift store
• Defensa Interior, an anti-Franco militant anarchist group in 1960s Spain
• DynCorp International, a major United States defense contractor
• Dimensional Insight, a business intelligence company
• Discovery Institute, an intelligent design advocacy group
• Death Incorporated, a gaming clan

Police/Military

• Detective Inspector, a police rank
• Drill instructor, a non-commissioned officer or Staff Non-Commissioned Officer in the armed forces or police forces with specific duties that vary by country
• The D.I., 1957 military film by Jack Webb
• Direct Impingement, a class of firearm gas operation mechanism

Publications

• Dagens Industri, a Swedish financial newspaper
• The Daily Iowan, a student newspaper for the University of Iowa.

Music

• D.I. (band), a punk band from Southern California
  • D.I. (EP), a 1983 EP by the same band above
• Despised Icon, a Canadian deathcore band

Other

• 501 (number) in Roman numerals
• Destination ImagiNation, an international children's problem-solving competition
• DHARMA Initiative, a fictional research project
• Digital Intermediate, the digital equivalent of intermediate film prints
• Diplomi-insinööri, a Finnish 6-year engineering degree
• Direct Ignition, see Distributor#Direct ignition
• Direct Instruction, an instructional method focused on a systematic curriculum design
• Disposable Income, total personal income minus personal current taxes
• Document of Identity issued by the Hong Kong Immigration Department
• Diameter, the distance across the middle of a circle
• Disability Insurance, a form of insurance that insures the beneficiary's earned income against the risk that a disability will make working uncomfortable

See also

• Di (disambiguation)
• D1