86 Learning the Basics
Printing your work
You may use all the letters and numbers on the keyboard plus
these characters: _ ^ $ ~ ! # % & { } ( ) @ and ‘. MS-DOS® file
names are not case-sensitive and must not contain spaces.

Using a file extension

Most programs assign an extension to the file name that identifies
the file as being created in the program with a particular format.
For example, Microsoft® Word saves files with a.doc extension.
Any file name with an extension of “.doc” is assumed to be a
Microsoft® Word file. Creating your own extension is usually
unwise, since the program is unlikely to recognize a strange
extension and may refuse to handle your file correctly.
Printing your work
Ensure the operating system is set up for your printer as described
in “Using a printer” on page 126.
HINT: You only need to set up the printer the first time you
connect it. If you use more than one printer or are changing
printers, you will need to set up the Windows®XP
Professional operating system to run with the additional
printer(s).
To print a file:
1If your printer is not on, turn it on now.
2Open the File menu of your Windows® program and click
Print.
The program displays a Print dialog box.