HM or hm may refer to:

Arts and entertainment[edit]

• HM (magazine), a Christian hard rock magazine
• Hidden Machine, a type of item in Pokémon

Businesses, groups, organizations[edit]

• H&M, a Swedish clothing company
• Hindustan Motors, an automobile manufacturer of India
• Air Seychelles (IATA airline code HM)

People[edit]

• Henry Molaison, aka Patient H.M., a man with anterograde amnesia
• His or Her Majesty, a form of address for various monarchs
• Home Minister, an interior minister
• Hospital corpsman, in the United States Navy
• Sisters of the Holy Humility of Mary's postnominal initials

Other uses[edit]

• Heard Island and McDonald Islands (ISO 3166 digram and FIPS PUB 10-4 territory code HM)
  • .hm, the Internet country code top-level domain ostensibly for the above
• Hectometre (hm), an SI unit of length
• Hindley–Milner type system, in mathematics

See also[edit]

• All pages with titles beginning with HM
• All pages with titles containing HM