HM or hm may refer to:
The Hmong/Mong (RPA: Hmoob/Moob, IPA: [m̥ɔ̃ŋ]) is an ethnic group from the mountainous regions of China, Vietnam, Laos, Myanmar and Thailand.
HMS Hood (pennant number 51) was the last battlecruiser built for the Royal Navy. Commissioned in 1920, she was named after the 18th-century Admiral Samuel Hood.
HMHS Britannic (/brɪˈtænɪk/) was the third of the White Star Line's Olympic class of vessels. She was the sister ship of RMS Olympic and RMS Titanic, and was intended to enter service as the transatlantic passenger liner, RMS Britannic.
Hmong (RPA: Hmoob) or Mong (RPA: Moob), known as First Vernacular Chuanqiandian Miao in China (Chinese: 川黔滇苗语第一土语; pinyin: Chuānqiándiān miáo yǔ dì yī tǔyǔ), is a dialect continuum of the West Hmongic branch of the Hmongic languages spoken by the Hmong people of Sichuan, Yunnan, Guizhou, Guangxi, northern Vietnam, Thailand, and Laos.
HMS Victory is a 104-gun first-rate ship of the line of the Royal Navy, ordered in 1758, laid down in 1759 and launched in 1765. She is best known as Lord Nelson's flagship at the Battle of Trafalgar in 1805.
Her Majesty's Naval Base, Portsmouth (HMNB Portsmouth) is one of three operating bases in the United Kingdom for the British Royal Navy (the others being HMNB Clyde and HMNB Devonport).
Her Majesty's Naval Base, Devonport (HMNB Devonport), is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Portsmouth).
HMS Dreadnought was a battleship built for the Royal Navy that revolutionised naval power. Her entry into service in 1906 represented such an advance in naval technology that her name came to be associated with an entire generation of battleships, the "dreadnoughts", as well as the class of ships named after her.
HMAS Melbourne (R21) was a Majestic-class light aircraft carrier of the Royal Australian Navy (RAN). Operating from 1955 until 1982, she was the third and final conventional aircraft carrier to serve in the RAN.