Covering most classical, multivariable, modal control design techniques that were shown to be effective in practice, this text also proposes several new tools. The proposed new tools include: minimum energy eigenvector selection; low order observer-based control design; conversion to observer-based controllers; a new multimodel design technique; and modal analysis. The text is accompanied by a CD-ROM containing MATLAB software for the implementation of the proposed techniques. The software is in use in the aeronautical industry and has proven to be effective and functional.