The document outlines various external communication channels that can be used to engage with customers, prospects, analysts, alliances, consultants, integrators, universities, communities, and press. These channels include brochures, case studies, white papers, conference abstracts, articles, press releases, podcasts, videocasts, analyst reports, reference demos, visits, awards, user events, road shows, partner events, web seminars, executive events, public relations events, certifications, press relations, webzines, websites, blogs, social media, magazines, newsletters, direct marketing, and online ads.