• Heckler & Koch
  Heckler & Koch
  Heckler & Koch GmbH is a German defense manufacturing company that produces various small arms. Some of their products include the SA80, MP5 submachine gun, G3 automatic rifle, the G36 assault rifle, the HK 416, the MP7 personal defense weapon, the USP series of handguns, and the high-precision...
  
  , a German firearms company
• Handel og Kontor I Norge, the Union of Employees in Commerce and Offices in Norway
• Handels- og Kontorfunktionærernes Forbund i Danmark, the National Union of Commercial and Clerical Employees in Denmark
• Handknattleiksfélag Kópavogs
  Handknattleiksfélag Kópavogs
  Handknattleiksfélag Kópavogs is an Icelandic sports club from the town of Kópavogur, mainly known for its football and handball teams. The club has a football team playing at the second tier of Icelandic football after being relegated in 2008.-History:...
  
  , an Icelandic sports club
• Harman Kardon
  Harman Kardon
  harman/kardon is a division of Harman International Industries and manufactures home and car audio equipment.Founded in 1953 by Dr. Sidney Harman and Bernard Kardon — two men with a deep interest in music and the arts — the company helped create the high-fidelity audio industry. Their first product...
  
  , a manufacturer of home and car audio equipment
• HKScan
  HKScan
  HKScan Oyj is a Finnish manufacturer of meat foods and products, but nowadays its product range also includes ready meals and pet foods. It is based in Turku...
  
  , formerly Helsingin Kauppiaat, a Finnish meat producer
• Four Star Aviation
  Four Star Aviation
  Four Star Air Cargo ceased operation in December of 2009.Four Star Air Cargo is a cargo airline based in San Juan, Puerto Rico, United States Virgin Islands. It operates cargo services within the US and British Virgin Islands and to Puerto Rico...
  
  's IATA airline designator

• .hk
  .hk
  .hk is the designated Internet country code top-level domain for Hong Kong. Hong Kong Internet Registration Corporation is the only organization endorsed by the Hong Kong Government to undertake the administration of 'hk' domain names...
  
  , Hong Kong's country top-level Internet domain
• HK Magazine
  HK Magazine
  HK Magazine is a free-distributed English language city-living magazine. It is a Hong Kong-based English-language weekly published by Asia City Publishing Limited. Premiering in 1991, it targets young metropolitans. It offers discussions on social issues as well as entertainment listings. New...
  
  , Hong Kong-based English-language weekly published by Asia City Publishing Limited
• Hakenkreuz, the swastika as a symbol of the Nazi party
• Hexokinase
  Hexokinase
  A hexokinase is an enzyme that phosphorylates a six-carbon sugar, a hexose, to a hexose phosphate. In most tissues and organisms, glucose is the most important substrate of hexokinases, and glucose-6-phosphate the most important product....
  
  , an enzyme
• Sobolev space
  Sobolev space
  In mathematics, a Sobolev space is a vector space of functions equipped with a norm that is a combination of Lp-norms of the function itself as well as its derivatives up to a given order. The derivatives are understood in a suitable weak sense to make the space complete, thus a Banach space...
  
   H^k, in mathematics
• Hilfskreuzer (literally "auxiliary cruiser" in German), commerce raiders operated by Germany during World War II
• Hefnerkerze, an old photometric unit of luminous intensity

See also

• HK$, the Hong Kong dollar
• HK-47
  HK-47
  HK-47 is a fictional assassin droid from the 2003 video game Star Wars: Knights of the Old Republic, its sequel, Star Wars: Knights of the Old Republic II: The Sith Lords, and the Trials of Obi-Wan expansion pack to the massively multiplayer online game Star Wars: Galaxies...
  
  , fictional assassin droid from Star Wars video games
• Hunter-killer (disambiguation)
• Hell's Kitchen (disambiguation)