The list is of course incomplete, and subjective!
Professional non-profit organisations:
Microwave
modelling:
European manufacturers of microwave industrial systems:
Note: The listed companies are well established of which I have good knowledge
Others:
Links
to several sites (IEC, IEV, JMPEE, Patent offices/searches, the Martin Chaplin
water site) are given elsewhere in this site. It may be easiest to
go to the Sitemap.