Lotfi Zadeh, the father of fuzzy logic, coined the phrase computing with words (CWW) to describe a methodology in which the computation objects are words drawn from a natural language. This text explains how to implement CWW for making subjective judgments using the three components of a Perceptual Computer (encoder, CWW engines, and decoder) and then providing detailed applications. The coverage divides the content into application chapters and detail chapters, including brief summaries of detail chapters for readers more interested in applications. This is an important go–to for researchers and students in AI, fuzzy logic, computer science in general, and.