Over the years I've worked at or purchased products from most of the businesses listed in this thread. The industrial base is all but gone and I would think within 20-30 years virtually all of the existing industrial business will also disappear. Oddly enough growing up here most people referred to Somerville as a bedroom community due to other cities having larger industrial bases than us. Now it really is almost entirely devoid of traditional jobs so it really is a bedroom community more than ever.