The book had been in the making at Stanford for some time. I happened to use a manuscript of it in 1991 at Virginia Tech. I was pleasantly surprised how quickly a student could pick up relevant aspects of compuatational plasticity from this book; the book has a style of its own. We have successfully used the book in programming the integral (or endochronic) hardening rule with the incremental theory of plasticity. The book surely makes a useful companion to a plasticity textbook.It is disheartening to see that the numerical schemes for the integration of the constitutive equations of the endochronic theory are missing from the book.