Flying

• de Havilland
  De Havilland
  The de Havilland Aircraft Company was a British aviation manufacturer founded in 1920 when Airco, of which Geoffrey de Havilland had been chief designer, was sold to BSA by the owner George Holt Thomas. De Havilland then set up a company under his name in September of that year at Stag Lane...
  
  , a former UK aircraft manufacturer
• Decision height, an element of aviational instrument approach
• Independence Air
  Independence Air
  Independence Air was a low-cost airline, owned by FLYi, Inc., headquartered in the Loudoun Gateway Corporate Center in Dulles, unincorporated Loudoun County, Virginia, United States that operated from 1989 until 2006. Its route network focused on the East Coast of the United States, but it also...
  
  's IATA code

Health

• Department of Health (United Kingdom)
  Department of Health (United Kingdom)
  The Department of Health is a department of the United Kingdom government with responsibility for government policy for health and social care matters and for the National Health Service in England along with a few elements of the same matters which are not otherwise devolved to the Scottish,...
  
  , a branch of government
• Dermatitis herpetiformis
  Dermatitis herpetiformis
  Dermatitis herpetiformis , or Duhring's disease,Freedberg, et al. . Fitzpatrick's Dermatology in General Medicine. . McGraw-Hill. ISBN 0-07-138076-0. is a chronic blistering skin condition, characterised by blisters filled with a watery fluid...
  
  , a skin disease
• Doubled haploidy
  Doubled haploidy
  A doubled haploid is a genotype formed when haploid cells undergo chromosome doubling. Artificial production of doubled haploids is important in plant breeding....
  
  , a genetic status

Measurement

• Deutsche Härte (°dH), a measurement of hard water
• DH register, the high byte of an X86 16-bit DX register
• Dirham
  Dirham
  Dirham or dirhem is a unit of currency in several Arab or Berber nations, and formerly the related unit of mass in the Ottoman Empire and Persian states...
  
  
  • United Arab Emirates dirham
    United Arab Emirates dirham
    The dirham is the currency of the United Arab Emirates. The ISO 4217 code for the United Arab Emirates dirham is AED. Unofficial abbreviations include DH or Dhs. The dirham is subdivided into 100 ....
    
    

Methods

• Diffie-Hellman key exchange
  Diffie-Hellman key exchange
  Diffie–Hellman key exchange Synonyms of Diffie–Hellman key exchange include:*Diffie–Hellman key agreement*Diffie–Hellman key establishment*Diffie–Hellman key negotiation...
  
  , a cryptographic protocol
• Digital Humanities, a community of practice combining technology with humanistic inquiry
• District heating
  District heating
  District heating is a system for distributing heat generated in a centralized location for residential and commercial heating requirements such as space heating and water heating...
  
  , a method of heating multiple buildings from a central location

Sports

• Designated hitter
  Designated hitter
  In baseball, the designated hitter rule is the common name for Major League Baseball Rule 6.10, an official position adopted by the American League in 1973 that allows teams to designate a player, known as the designated hitter , to bat in place of the pitcher each time he would otherwise come to...
  
  , a baseball rule
• Downhill
  Downhill
  Downhill is an alpine skiing discipline. The rules for the Downhill were originally developed by Sir Arnold Lunn for the 1921 British National Ski Championships....
  
  , a skiing discipline
• Downhill mountain biking, a bicycling discipline

Other uses

• Delaware and Hudson Railway
  Delaware and Hudson Railway
  The Delaware and Hudson Railway is a railroad that operates in the northeastern United States. Since 1991 it has been a subsidiary of the Canadian Pacific Railway, although CPR has assumed all operations and the D&H does not maintain any locomotives or rolling stock.It was formerly an important...
  
  
• Dior Homme
  Dior Homme
  Dior Homme is the menswear division of Christian Dior SA, the French clothing retailer. Dior Homme is currently under the creative direction of Kris Van Assche since spring/summer 2008...
  
  , the menswear division of Dior
• Desperate Housewives
  Desperate Housewives
  Desperate Housewives is an American television comedy-drama series created by Marc Cherry and produced by ABC Studios and Cherry Productions. Executive producer Cherry serves as Showrunner. Other executive producers since the fourth season include Marc Cherry, Bob Daily, George W...
  
  , a television series
• Dear Husband, a shorthand phrase common in online forums
• Denavit–Hartenberg parameters, a type of robotics convention
• Documentary hypothesis
  Documentary hypothesis
  The documentary hypothesis , holds that the Pentateuch was derived from originally independent, parallel and complete narratives, which were subsequently combined into the current form by a series of redactors...
  
  
• Dh (digraph), in linguistics
• Harry Potter and the Deathly Hallows, as referred to by the fandom