Ever hear of Bill Fernandez? Maybe not, but his importance to Apple’s early success is undeniable. And it makes for a great Sunday read.

“When Woz designed something, most of the design was in his head,” said Fernandez. “The only documentation he needed was a few pages of notes and sketches to remind him of the overall architecture and any tricky parts. What the company needed was a complete schematic showing all the components and exactly how they were wired together.”

This is where Bill Fernandez comes in. This is his story.