I Googled: "Steve Wozniak" "ham radio" callsign and found this: http://www.wired.com/wired/archive/13.07/solar.html It says his call is WA6BND. However, QRZ.com says that call is not currently assigned, so either that's the wrong call or he let it lapse. 73, Jeff WB5GWB/AE Long Island, NY