Dear Colleague, We are planning a Time Projection Chamber Symposium to be held at the Lawrence Berkeley National Laboratory on Friday October 17th. The purpose of the symposium is to review the experience gained over the past 25 years in designing, building and operating Time Projection Chambers and other electronic imaging devices in different experimental environments such as electron-positron and hadron colliders, fixed target experiments, heavy ion colliders and low background experiments. New TPC designs for proposed and planned experiments, and for upgrades of existing detectors will be presented. New technical developments and current R&D in ionization signal amplification, electronic readout and mechanical construction, in signal processing and analysis, and in studies of relevant gas and liquid properties will be discussed. New ideas for electronic imaging and applications of TPC technologies will be summarized. You can find the TPC Symposium web page at http://www-tpc.lbl.gov/symposium/ Registration is not officially open yet as we're just setting up the accounting. You can access your mailing information in the symposium database using the "Pre-Registration" link provided on the web page. Sincerely, Michael Ronan