HM or hm may refer to:

Arts and entertainment

* ''HM'' (magazine), a Christian hard rock magazine *

Hidden Machine Hidden or The Hidden may refer to: Film and television Film * ''The Hidden'' (film), a 1987 American science fiction/horror film * ''Hidden'' (2005 film) or ''Caché'', a French thriller film * ''Hidden'' (2009 film), a Norwegian horror film ...

, a type of item in Pokémon

Businesses

* H&M, a Swedish clothing company *

Hindustan Motors Hindustan Motors is an Indian automotive manufacturer based in Kolkata, West Bengal, India. It is a part of the Birla Technical Services conglomerate. The company was the largest car manufacturer in India before the rise of Maruti Udyog. Hind ...

, an automobile manufacturer of India *

Air Seychelles Air Seychelles is the national airline of the Republic of Seychelles. Its head office is located at Seychelles International Airport on the island of Mahé and it operates inter-island and international flights and charter flights. History E ...

(IATA airline code)

Other uses

Heard Island and McDonald Islands The Territory of Heard Island and McDonald Islands (HIMI) is an Australian external territory comprising a volcanic group of mostly barren Antarctic islands, about two-thirds of the way from Madagascar to Antarctica. The group's overall size ...

(ISO 3166 digram and FIPS PUB 10-4 territory code) **

.hm .hm is the Internet country code top-level domain ( ccTLD) of the Heard and McDonald Islands, uninhabited islands in the southern Indian Ocean under the sovereign control of Australia. Although .hm gets a small amount of use, Australia uses the ...

, the Internet country code top-level domain ostensibly for the above *

Hectometre The hectometre ( International spelling as used by the International Bureau of Weights and Measures; SI symbol: hm) or hectometer (American spelling) is a unit of length in the International System of Units (SI), equal to one hundred metres and t ...

, hm, an SI unit of length * Henry Molaison, aka Patient H.M., a man with anterograde amnesia * His or Her

Majesty Majesty (abbreviated HM for His Majesty or Her Majesty, oral address Your Majesty; from the Latin ''maiestas'', meaning "greatness") is used as a manner of address by many monarchs, usually kings or queens. Where used, the style outranks the st ...

, a form of address for various monarchs *

Hindley–Milner type system A Hindley–Milner (HM) type system is a classical type system for the lambda calculus with parametric polymorphism. It is also known as Damas–Milner or Damas–Hindley–Milner. It was first described by J. Roger Hindley and later rediscovere ...

, in mathematics *

Hospital corpsman A hospital corpsman (HM r corpsman is an enlisted medical specialist of the United States Navy, who may also serve in a U.S. Marine Corps unit. The corresponding rating within the United States Coast Guard is health services technician (HS) ...

, in the United States Navy *

Sisters of the Holy Humility of Mary The Sisters of the Humility of Mary is a Roman Catholic religious congregation, founded at Dommartin-sous-Amance, France, in 1855. The community immigrated to the United States in 1864, and established themselves near New Bedford, Pennsylvania. Th ...

's postnominal initials {{disambiguation