A mini-AT motherboard. It has 4 ISA slots, 3 PCI slots, dual IDE ports, an Intel Pentium in a Socket 7 slot, and 4 72-pin SIMMs
https://digipres.club/system/media_attachments/files/112/062/821/653/129/867/original/adc70cd58f169b02.jpeg
Yanked all the cards so you can see the motherboard.
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