The μ-Analysis and Synthesis Toolbox (μ-Tools) is a collection of functions (commands) developed primarily for the analysis and synthesis of control systems, with an emphasis on quantifying the effects of uncertainty. μ-Tools provides a consistent set of data structures for the unified treatment of systems in either a time domain, frequency domain, or state-space manner. μ-Tools also gives MATLAB® users access to recent developments in control theory, namely H∞ optimal control and m analysis and synthesis techniques. This package allows you to use sophisticated matrix perturbation results and optimal control techniques to solve control design problems. Control design software, such as μ-Tools, provides a link between control theory and control engineering.