Tom.. We use the SED (circle with 3 arrows pointing in) on our PWB Assemblies that contain Electrostatic Sensitive Devices (ESD). We also include a note that references DOD-HDBK-263 for the protective handling or testing of these devices. Hope this helps. Regards, Bob Vanech Bob Norden Systems *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************