Ha

Ha may refer to:

Agencies and organizations

Arts and entertainment

Language

People

Places

Science and technology

Chemistry

Medicine

Other uses in science and technology

  • ha (function prefix) (half), a prefix for some trigonometric functions in mathematics
  • Hartree, an atomic unit of energy
  • Hectare (ha), a unit of area
  • Hectoampere, a unit of electric current
  • High availability, systems design and implementation with a view to maximising service
  • Hour angle, in astronomy, one of the coordinates of the equatorial coordinate system

Surnames

Transportation

Other uses

See also

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