Revised biographies detail the lives of computer science innovators.

Includes new and revised ethical issues written by the authors and contributors.

Includes all new call-outs and Did You Know sections.

A reorganized Programming Layer (Chapters 6-9) helps students understand and retain key material.

Includes additional information on programming language, providing examples from Scheme and Prolog.

A major new section on social networking and gaming pique students interest by delving into this growing area of student interest.