The document discusses the evolution of digital media technologies and diffusion theory. It covers Rogers' linear innovation-diffusion theory involving five steps of adoption. It also discusses categories of adopters including innovators, early adopters, early majority, late majority and laggards. The document then provides examples and statistics about early adopters from a 2007 report and barriers to adoption and innovation such as profit motives, habit and social groups. It also discusses the social construction of technology and shaping of technologies by military and customers.