Hx or hx, is a digraph in the Esperanto x-system orthography, representing the consonant sound or , normally spelled as H or h in the Esperanto alphabet
HX (convoy), a convoy code used during World War II
The HX postcode area, covering Halifax, Elland, Hebden Bridge and Sowerby Bridge in England
Hummer HX, a concept automobile produced by HUMMER
Dolby HX and Dolby HX Pro, dynamic range headroom extension systems for analog recording on magnetic tape
.hx, the file extension for the Haxe programming language
HX, the human experience, referred to in the context of business. Business HX is the human experience that a business creates. (Coined by HX Works in Jan 2014).