Apple Macintosh System 7.5 - Manual (Page 92)

Folder protection
You can protect the software programs that make your computer operate
from being accidentally deleted. The General Controls control panel lets you
lock your System Folder and Applications folder. When the folders are
protected, items inside cannot be removed or renamed. You can still add
items to these folders.
To protect the items in your System Folder and Applications folder, open the
Apple (K) menu and choose Control Panels. Then open the General Controls
panel.
84 Chapter 6
To keep items in your
System Folder from
being renamed or
removed, click to put
an X in the box.
To automatically create an Applications folder
and keep items in it from being renamed or
removed, click to put an X in the box.