This guide and reference is designed for anyone who is responsible for writing software documentation for computer users (both programmers and end-users). The focus throughout is on the "writing" -- NOT the production -- of software manuals, and does not assume knowledge of any specific computer. Covers topics such as types of manuals; writing the first draft; style; graphic elements; rewriting and editing; writing the appendices, glossary and index; testing the manual; and online documentation. Includes examples of bad writing and layout, together with suggested improvements. For technical writers and for analysts, programmers, managers, directors in software firms.