What the Icons Mean

Throughout the book, I use icons to call your attention to points that are particularly important:

I use Note icons to tell you that something is important — perhaps a concept that could

help you master the task at hand or something fundamental for understanding

subsequent material.

Note

Tip icons indicate a more efficient way of doing something or a technique that might not

be obvious.

Tip

section “About This Book’s Website, ” later in this Introduction.

On the Web

I use Caution icons when the operation that I’m describing can cause problems if you’re

not careful.

Caution

I use the Cross Reference icon to refer you to other chapters that have more to say on a

Cross-Ref

subject.

How This Book Is Organized