Apple, Google and Facebook generated $333 billion of revenue last year with 205,000 employees. In 1993, three of the most successful, technologically oriented companies based in the Northeast — Kodak, IBM and AT&T — needed more than three times as many employees, 675,000, to generate 27 percent less in inflation-adjusted revenue.

At the same time, I recently learned that Facebook has 1,000 engineers working solely on its core Facebook mobile app. That’s a staggeringly high number to me. I’m sure Facebook’s successor will be driven by 100 people.