Measurement is a critical aspect of the scientific process. If measurement systems are not accurate and precise, the findings of experiments will most likely be spurious. In applied behavior analysis, the most prevalent form of measurement is human observation with automated measurement being used sporadically. Automated measurement is generally more accurate as it minimizes recording error. This paper reviews some of the common measurement systems currently in use and examines some new technologies that may expand the use of automated recording in the future. Copyright © 2013 John Wiley & Sons, Ltd.