I am a former Wiki-holic, and mostly just browse, as I have almost no knowledge to contribute. The primary topics that I am interested in have pretty good articles lately, but occasionally I do find a small bit that I can contribute :)
I started here some years ago (~2001) and started a number of pages that have taken on lives of their own. That was before the dark-ages, as things are measured in computer time.
I am an instructor, currently teaching the maintenance of medical x-ray imaging and oncology systems using x-ray and electronradiation. it the past he taught semiconductor process and semiconductor processing.