HX, Hx, H_x, or hx may refer to:

Businesses and brands

• Dolby HX and Dolby HX Pro, headroom extensions for analog recording
• Hummer HX, a concept automobile
• RMMV HX range of tactical trucks, military trucks
• Hong Kong Airlines (IATA code)

Other uses

• Ĥ, a character in the Esperanto language
• .hx, the file extension for the Haxe programming language
• HX (convoy), a convoy code used during World War II
• Hx or H_x, medical history
• HX postcode area, England, covering the Halifax area
• Short name for Harolds Cross, a suburb of Dublin, Ireland.
• Hydrogen halide, a chemical compound
• Informal engineering shorthand for heat exchanger
• Human experience, see Customer experience (CX), User experience (UX).

See also

• Hex (disambiguation)

Film

• HX, a 2002 British film; co-production with Pathé
• HXII, a 2005 British film; co-production with Pathé and Fuzzy Door Productions