QZ may refer to:
Qzone (Chinese: QQ空间) is a social networking website which was created by Tencent in 2005. It allows users to write blogs, keep diaries, send photos, listen to music, and watch videos.
Quartz (qz.com) is a website owned by Atlantic Media Co. Its staff includes reporters formerly employed at Bloomberg, The Wall Street Journal, The Economist, and The New York Times.
The quantum Zeno effect (also known as the Turing paradox) is a situation in which an unstable particle, if observations are repeatedly made i.e., by shining a laser on the sample to take its measurement under a microscope or using some other form of atomic measurement, the unstable particle will never decay.
The Quasi-Zenith Satellite System (QZSS) is a proposed three-satellite regional time transfer system and the satellite-based augmentation system for the Global Positioning System that would be receivable within Japan.
Qkumba Zoo was a dance music trio from Johannesburg, South Africa, consisting of vocalist Levannah, dancer/sculptor Tziki and musician/producer Owl.