Apple Macintosh System 7.5 - Manual (Page 70)

Easy file opening
With Macintosh Easy Open, you can open most Mac OS, DOS, or Windows
files even if you don’t have the program that created the document. Your
computer uses “translators” in conjunction with your programs to open
documents created in programs you do not have. For example, your computer
might use a translator and your word processor to open a document created in
a word-processing program that you do not have.
To set Macintosh Easy Open options, open the Apple (K) menu and choose
Control Panels. Then open the Macintosh Easy Open control panel.
Extensions Manager
The Extensions Manager control panel lets you turn on or off startup
programs (also known as system extensions and control panels). You can also
use the Extensions Manager to switch between sets of extensions.
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