Silicon Bay is bigger than Silicon Valley. There are more software developers in the Seattle area than around San Francisco

Apple is the latest leading-edge tech company to open a Seattle engineering office, joining Google, Facebook, Twitter, Salesforce, Oracle, LinkedIn, Groupon, eBay, and (just last week) Alibaba.

First, Seattle is the software capital of the world. That’s literally – numerically – true: the U.S. Bureau of Labor Statistics reports more “Software Developers” (“Applications” + “Systems”) in Seattle (Seattle-Everett-Bellevue) than in Silicon Valley (San Jose-Sunnyvale-Santa Clara).

Second, Seattle the cloud capital of the world.