Apple Power Macintosh 8100 Series - Manual (Page 121)

You can install printed circuit boards (called cards) for video and graphics
applications, networking and communications, additional processing power,
or other purposes. The cards fit into connectors, called expansion slots, inside
the computer.
Your Macintosh has three expansion slots, each designed to accept a NuBus
card.
IMPORTANT Some cards may need to be installed by an Apple-authorized
service provider. Check the information that came with the card.
WARNING Do not remove any factory-installed cards from inside your
computer. Pulling a factory-installed card out at an angle can damage
your equipment. Any NuBus expansion card you install will not operate
properly if the factory-installed card has been removed. If a factory-
installed card needs to be removed, see an Apple-authorized service
provider.
WARNING Be sure to use the Macintosh NuBus Adapter Card designed
specifically for your model of the computer. Failure to do so could
damage the card and your computer.
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Appendix B
Installing an Expansion Card
Read this appendix for instructions
on installing an expansion card
in your computer.