1970-80s which is when some of the first computers were created like apple computers which looked like a giant cube and a rectangle on the side which is very different than what we have today.
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I think it’s rom because rom chip is on the PC mother chip
The advantage of using plenum cable for twisted- pair cable is it is "Fire resistant"
<u>Explanation:</u>
Plenum cable is a cable that is used in plenum spaces of buildings. These cables have fire resistance characteristic with low smoke. These cables are self extinguishing, and never re-ignite. They require less space for installation and allows space for air circulation to be used by the HVAC system. Twisted-pair, coaxial, HDMI and DVI variants of cable are manufactured in the plenum version. Plenum cable is mandatory to be fixed in any "air handling" area.
That would be Wiki.......