Since the release of Technical Reference (TR) 1737-5, Riparian and Wetland Classification Review, in 1990, the use of classification in riparian and wetland disciplines has been refined. Some of the previously described classification techniques have become increasingly popular, and new systems have emerged to fill the gaps identified by land managers, wetland regulators, and wetland scientists. While TR 1737-5 focused on vegetation classification methods, this Technical Reference presents a general discussion of several areas of classification related to riparian and wetland management and provides guidance on applying classification to solve land management problems.