<P> <B> </B> This is a Second Edition of the best-selling guide to the KornShell command and programming language by the original inventors of the language. It provides a specification for the KornShell language, tutorial material for those new to <I>ksh</I> (the program that implements the KornShell language), and a comprehensive reference for all <I>ksh</I> users. <B> </B> Covers major new additions to the KornShell language ksh93 (including command completion and a key binding mechanism); provides tutorials for both of the functions of ksh (as an interactive command language, and as a programming language); contains numerous examples illustrating the features of ksh; and features a Quick Reference summary of the KornShell language with page references to the book. <B> </B> For both new users with little shell experience, and for experienced computer users who are familiar with ksh and/or other shells. ISBN of 1st Edition: 0-13-516972-02. </P>