Hz is the International Standard symbol for Hertz, the unit of frequency
HZ may also stand for:
- Habitable zone, the distance from a star where a planet can maintain Earth-like life
- Hazard, a situation that poses a level of threat
- Haze, METAR code HZ
- Herero language, ISO 639 alpha-2
- Herpes zoster, shingles
- Holden HZ, automobile produced by General Motors Holden in the late 1970s
- Hrvatske Željeznice, the Croatian national railway (HŽ)
- HZ (character encoding)
- SAT Airlines IATA airline designator
- Saudi Arabia aircraft registration code
- Horizons: Empire of Istaria
The HZ character encoding is an encoding of GB2312 that was formerly commonly used in email and USENET postings. It was designed in 1989 by Fung Fung Lee of Stanford University, and subsequently codified in 1995 into RFC 1843.
The HZ, short for Hanzi , encoding was invented to facilitate the use of Chinese characters through e-mail, which at that time only allowed 7-bit characters. Therefore, in lieu of standard ISO 2022 escape sequences (as in the case of ISO-2022-JP) or 8-bit characters (as in the case of EUC), the HZ code uses only printable, 7-bit characters to represent Chinese characters.
It was also popular in USENET networks, which in the late 1980s and early 1990s, generally did not allow transmission of 8-bit characters or escape characters.