A reader writes:

The article doesn't take into consideration the outreach of the Apple product line beyond the jobs he created directly. The comparison to Ford in the early 20th century isn't completely accurate. Back then, you bought a car and that was about it. Apple (and any computer hardware manufacturer) produces a line of iProducts that spawned a whole industry of specialized developers, marketers, designers and manufacturing companies that create things for Apple's products. Software, peripherals, accessories, services. Apple's innovations caused those job markets to skyrocket. Pre-iPhone and iPad, smartphone and tablet app developers were few and far between. Now there are entire companies based solely on building software for their mobile devices.