This document discusses the evolution of communication patterns from the past to present. It begins by noting how Johannes Gutenberg's movable type press in 1450 enabled mass reproduction and distribution of written text, disrupting the scribal profession. It then discusses how digital technologies have created new communication patterns, moving from traditional broadcast "one to many" to "many to many" interactions online. The document suggests that services like Twitter represent this new many-to-many communication pattern and are changing how information is both created and consumed.