WPAN : Wireless Personal-Area Network. WPAN is a PAN that uses wireless means of connecting, however since all PAN technologies, such as Bluetooth, are wireless, you can consider the terms synonymous
Young & Company Electric Power Products and Related Engineering Services, Glossary of Electrical Terms, http://www.youngco.com/young2.asp?ID=4&Type=3, CA., USA 2001. (Electr Sfty - Amer) {514}