That brings back memories. That was my first PC back in ... 1986? I was working at Bell Labs and they sold them cheap to employees. It's made by Olivetti as I recall. AT&T had bought Olivetti and was in the process of running it into the ground.... The motherboard is mounted upside down. To access it, you turn the PC over and remove the bottom case. I saw several posts by people complaining that a memory upgrade (socketed DIPs on the MB) required tearing the entire machine apart. They didn’t realize that all they had to do was turn it over and remove 2 screws. 😊 Dave