04Jun2021 status - Of ~1,000+ "user usable" links on this webSite (not including links in [adobe pdf, word processing, spreadheet, etc] files), there are 60-100 problematic links including including links to ~30 external sites that have changed or disappeared. The vast majority of links are in the "Neural Network Conference Guides" in document files , while perhaps 300+ are in the rest of the webSite.