Microwaves and RF magazine has produced their 50th anniversary issue. There are many articles that describe how microwave & RF technology has changed overt the years. One article that caught my interest describes the history of companies in the industry past and present: Where Are They Now?. I was surprise to see how many companies have come, gone, and merged. The US defense department spends $10B/year managing and mitigating obsolescence issues as reported in 2008 so this activity is a really issue for military projects and a potential opportunity for enterprising businesses, perhaps.