When I found them I thought they were "interesting white ISA slots that things slid into more easily". I was at that time convinced that EISA just meant 16-bit ISA as opposed to 8-bit, so I didn't even think that it might be something different considering that 16-bit ISA cards were working just fine.
If they are just oddball ISA slots, then I shall henceforth just refer to them as "white ISA slots" or "magical ISA slots" (magical due to the ease of insertion compared to the black ones).
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