Google "Corkboard" Server, 1999

In 1988, Stanford University graduate students Larry Page and Sergey Brin launched Google and built thirty racks of servers, including this one, from cheap parts. The server is on temporary display at the National Museum of American History. 

 

"Each server row used corkboard insulating pads—hence the name—and had eight 22-gigabyte hard drives and four personal computers. Because components frequently failed, the system required effective fault-tolerant software."

More photos at this Link via Notcot