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...