The document discusses the diffusion of email innovation through interviews with six subjects. It describes the five adopter categories and characteristics of innovations that influence their adoption, including relative advantage, compatibility, complexity, trialability, and observability. For each characteristic, it provides quotes from subjects on their perceptions of email. The interviews found that perceptions of email's advantages over mail and phone increased its adoption rate. However, complexity was initially a barrier for some. The future of communication through technologies like email is also discussed.