Introduction 13

Conventions

Keys

The keyboard keys are used in the text to describe many computer operations. A distinctive typeface identifies the key top symbols as they appear on the keyboard. For example, Enter identifies the Enter key.

Key operation

Some operations require you to simultaneously use two or more keys. We identify such operations by the key top symbols separated by a plus sign (+). For example, Ctrl + C means you must hold down Ctrl and at the same time press C. If three keys are used, hold down the first two and at the same time press the third.

ATDT Text you are to type in is represented in the type face you see to the left.

Display

ABC Text generated by the computer that appears on its display screen is presented in the type face you see to the left (bold).