This document discusses the history and development of computer-mediated communication (CMC) and social media. It covers how CMC began with message boards and email and grew with the World Wide Web in the 1990s. Early online communities like Classmates.com and MySpace developed user profiles beyond just sharing email. Social networking became mainstream with sites like Facebook and Twitter. The document also discusses theories of diffusion of innovations, uses and gratification, and how social media both extends communication and makes solidarity more difficult due to impersonality. It poses discussion questions about how CMC has influenced relationships and the transfer of cultural understandings through internet memes.