Been a chemist for 40 years with 20 years in electronics, especially materials and device packaging. Retired into the expert witness field focused on patent litigation. Have had iPad 3G for several months and also own Touch G3. Main hobby is digital photography; Sony Alpha 550, Minolta lenses. Also write tech articles and books. Technical historian in printed circuits and packaging. Attempting to replace laptop with iPad. For court work, PDF is essential and am satisfied with software. Hope to replace Powerpoint with Presentation. Have lots of gadgets including radio gear - call is W1PHD.