This chapter summarizes several notes on signal processing and numerical computation that have been compiled in the course of performing the experiments reported throughout this volume. While these techniques are certainly not limited to processing data from nonlinear dynamics research, they have proven particularly useful in helping obtain good quantitative agreement between simulations and experiments with the strongly nonlinear models treated herein. Without careful attention to matters such as transducer dynamics, recovering correct time his tory data is especially difficult, and errors that might go unnoticed in the analysis of linear systems can be unacceptable in the nonlinear setting.