A review of acoustic emission data generated by dislocation processes during the deformation of metals will be presented. The information, developed from an extensive review of the acoustic emission literature and from current unpublished results, will be analyzed to identify source mechanisms and characteristics of the emissions. The analysis will concentrate on the influence of the metallurgical condition of the test material on the observed acoustic emission. The effects of testing parameters and techniques will also be examined. Examples of major concerns in these areas will include the effects of crystal structure, purity, grain size, heat treatment, prior mechanical work and deformation orientation with respect to crystal axes or crystallographic texture; difference in acoustic emission obtained during tensile, compressive and biaxial deformation; and a comparison of acoustic emission data presented as ringdown counts, burst rate, and RMS voltage. Some examples of acoustic emission results mistakenly attributed to dislocation mechanisms will also be discussed briefly. [Portions of this work were supported by NSF, AFOSR, and DOE (contract EY-76-C-04-3533).]