"The purpose of this publication is to compile a standardized set of terminology for mechanized logging machinery and logging methods for the Pacific Northwest. While other organizations have produced similar works with either a wider or narrower focus (Dean and Evans 1978, Mifflin and Lysons 1979, Ford-Robertson 1983, Granvik et al. 1983, American Society of Agricultural Engineers 1991, Society of Automotive Engineers, Inc. 1991), this publication is limited to mechanized logging equipment and logging methods. Terminology from Scandinavian and Canadian organizations, the Food and Agriculture Organization of the United Nations, and various U.S. organizations was compiled and synthesized into the terminology that follows. The publication is divided into sections on machinery and operations and on logging systems."--Introduction.