The influence of high-speed computer analysis of molecular, morphological and/or behavioral data to infer phylogenetic relationships has expanded well beyond its central role in evolutionary biology, now encompassing applications in areas as diverse as conservation biology, ecology, and forensic studies. The success of previous versions of PAUP: Phylogenetic Analysis Using Parsimony has made it the most widely used software package for the inference of evolutionary trees. In addition, the PAUP manual has proven to be an essential guide, serving as a comprehensive introduction to phylogenetic analysis for beginning researchers, as well as an important reference for experts in the field.

Professor David L. Swofford, created and released PAUP* version 4.0 in 2002 on a CD-ROM. The new release of the software package is for inference of evolutionary trees, for use in Macintosh, Windows, UNIX/VMS, or DOS-based formats.

http://paup.csit.fsu.edu for more info.