HQ often refers to headquarters.
The HQ-9 (simplified Chinese: 红旗-9; traditional Chinese: 紅旗-9; pinyin: Hóng Qí-9; literally: "Red Banner-9") is China’s new generation medium- to long-range, active radar homing surface-to-air missile.
HQ (also HQ Trivia) is an app and trivia game, released in August 2017 on iOS and later for Android on 31 December 2017. Players can participate at no cost in daily trivia games through which they can outright win or split prize money if they can correctly answer a series of questions of increasing difficulty.
The HQ-7 (FM-80) (Chinese: 红旗; pinyin: hóng qí, "red flag" or "red banner") is a short-range air defense missile.
The Hongqi-61 (Chinese: 红旗-61; pinyin: Hóng Qí-61; literally: "Red Banner-61") is the first generation Chinese SARH guided surface-to-air missile (SAM).
HQ is the eighth studio album by English folk/rock singer-songwriter and guitarist Roy Harper. It was first released in 1975 by Harvest Records.
In image processing, hqx ("hq" stands for "high quality" and "x" stands for magnification) is one of the pixel art scaling algorithms developed by Maxim Stepin, used in emulators such as Nestopia, FCEUX, higan, Snes9x, ZSNES and many more.
HQ AB is a Swedish finance and banking corporation founded by Sven Hagströmer and Mats Qviberg, and which is currently being liquidated after having had its banking licence revoked on August 28, 2010.
The S-300 (NATO reporting name SA-10 Grumble) is a series of initially Soviet and later Russian long range surface-to-air missile systems produced by NPO Almaz, based on the initial S-300P version.