This EKB provides an introduction to electron backscatter diffraction (EBSD). It explains how the technique works, including how the crystal structure is determined from the patterns produced by diffracted electrons, and outlines the kind of information that EBSD can produce. The briefing also details how that information can be displayed and used. It outlines practical issues relating to EBSD and describes potential problems that may arise, as well as how to resolve them. The EKB also includes some examples of how EBSD is being used in research, plus details how the technique will advance in terms of instrumentation, integration and applications over the next few years.