From their website:
NETWORKS is an Advanced Technological Education (ATE) National Resource Center funded, in part, by the National Science Foundation. We provide venues for creating, sharing, and promoting
digital resources and faculty professional development for semiconductor manufacturing, automation, electronics, and alternative/renewable energies. Our Digital Library contains classroom ready resources that are current, relevant, and easy to implement into your curriculum. We also provide free Online Webinars, TechSpectives Blog, and @matec Newsletter
to keep you up-to-date with emerging technologies and educational issues.
This site also leads to an Electronics and Controls resource page with many great presentations about electronics, PID control, TagNames and many other topics.