An AT tower, the side panel open. There's a power supply near the top, several drives (HD caddy, CD ROM, 3.5" floppy disk, 3.5" hard drive), then a motherboard at the bottom with lots of ribbon cables
https://digipres.club/system/media_attachments/files/112/045/763/402/090/253/original/258a277d63b178a3.jpeg