H (disambiguation)

H is the eighth letter of the Latin alphabet. H may also refer to:

• h, an abbrievation for hour
• h (Cyrillic) or shha, a letter of the Cyrillic alphabet
• h (ipa) or voiceless glottal fricative in the International Phonetic Alphabet
• H (musical note) the seventh note of the solfege in continental European notation
• H (S-train), a train service in Metropolitan Copenhagen, Denmark
• H (NYCS), the Rockaway Park Shuttle service of the New York City Subway system
• ^H or backspace
• .h, the filename extension for C header files
• H band, a NATO radio range
• Hamiltonian mechanics
• Handcuffs
• Haplogroup H (mtDNA)
• Haplogroup H (Y-DNA)
• Heat content or enthalpy
• Hecto, the SI prefix for hundred, 10²
• Helipad
• henry (inductance), the SI derived unit for electrical inductance
• Heroin
• Histidine
• H number, the listing reference of music by Honegger and Martinů in the catalogues by Harry Halbreich
• Hospital
• Hubble constant
  • Dimensionless Hubble parameter
• Hungary's international license plate code
• Hurst exponent in fractal geometry
• Hydrogen

In titled works:

• H (film), a 2002 Korean film
• H (French TV series)
• "H" (song), a song by Ayumi Hamasaki
• "H.", a song by Tool
• h, an album by hitomi

In people:

• H (gang rapist), an unnamed member of a Lebanese-Australian gang rape squad in the Sydney gang rapes
• Edgar Hardcastle or H., a theoretician of Marxian economics
• Steve Hogarth or h, vocalist for Marillion
• Adrian Smith or H, guitarist for Iron Maiden
• Ian Watkins (Steps) or H, formerly of the group Steps

H may also be used for:

• Ecchi, lewd
• Isoniazid's World Health Organisation abbreviation
• Magnetic field strength or intensity
• Montreal's Canadian postal code prefix
• Planck's constant
• Hubble constant
• H, a corner point joining four edges of the Brillouin zone
• h, the convection coefficient
• [H], the ASCII representation of HardOCP's logo
• H(x) or heaviside step function
• <math>\begin{matrix}H(X)\end{matrix}</math> or information entropy
• H, designator for the ITU-T series of audiovisial and multimedia systems recommendations
• <math>\mathbb{H}</math> or quaternions
• H, Hauptstimme in Second Viennese School scores