A laboratory located in Hamburg, Germany. It is the site of the HERA accelerator, which hosts the ZEUS and H1 experiments. For more information see: http://www.desy.de/html/home/fastnavigator.html.

Deutches Elektronen-SYnchrotron; a laboratory in Hamburg, Germany that conducts particle physics research.

The DESY (Deutsches Elektronen Synchrotron, "German Electron Synchrotron") is the biggest German research center for particle physics, with sites in Hamburg and Zeuthen.