A new edition of the classic primer in the psychology of computation, with a new introduction, a new epilogue, and extensive notes added to the original text. In The Second Self, Sherry Turkle looks at the computer not as a 'tool,' but as part of our social and psychological lives; she looks beyond how we use computer games and spreadsheets to explore how the computer affects our awareness of ourselves, of one another, and of our relationship with the world. 'Technology,' she writes, 'catalyzes changes not only in what we do but in how we think.' First published in 1984, The Second Self is still essential reading as a primer in the psychology of computation. This twentieth anniversary edition allows us to reconsider two decades of computer culture-to (re)experience what was and is most novel in our new media culture and to view our own contemporary relationship with technology with fresh eyes. Turkle frames this classic work with a new introduction, a new epilogue, and extensive notes