This book presents information using conventions designed to make the information readable and easy to follow. Each exercise consists of a series of tasks, presented as numbered steps (1, 2, and so on) listing each action you must take to complete the exercise. Text that you type displays in boldface. For example, if you are instructed to type some text to an existing block of code, the text you are to type is displayed in bold. Glossary terms marked in the text are explained in the glossary at the end of the book.