Apple PowerBook (2400c) - Manual (Page 69)

Hiding and showing windows on the desktop
You can hide all windows except those of the active program by choosing
Hide Others from the Application menu.
The other programs remain open even though their windows are hidden.
When you switch to another program, its windows become visible again.
If you want to see all the open windows, choose Show All from the
Application menu.
Backing up your files and restoring preinstalled software
Making backup copies of important files is good protection against possible
damage to the originals. Files on your hard disk and on the CD that came with
your PowerBook allow you to restore the software that came with the
computer.
Restoring system software and preinstalled programs
m If the System Folder on your hard disk is damaged, you can reinstall that
essential software from the CD that came with your computer. See
“Reinstalling System Software” in Chapter 7 for instructions.
m The CD that came with your computer also contains a program for
restoring the complete system software and all preinstalled application
programs from the CD. See the document “CD—Important Information”
on the CD for instructions.
69 Installing and Using Application Programs