When the company first started they didn’t have a facility to manufacturer parts for the company. They did all of their work solo. They used parts from Nikon cameras. But over time the company continued to go. I didn’t know that companies had revenues in excess of 3.5 trillion dollars. I thought only governments had that kind of money. Well I guess you learn something new everyday. 4 trillion. Wow. Read about the history of Canon. Click the link.