The Little Book on Subspace Tracking is a taxonomy and resource guide that covers the "baby-boom" years of subspace updating. It is meant to be an exhaustive reference of subspace tracking algorithms from 1970 to 1998 when subspace trackers exploded onto the signal processing scene. It provides a very thorough outline of the field for which graduate students and researchers might turn to for guidance and to get their arms around the field. It is not...