I have a cell phone that doesn't behave like a phone: It behaves like a computer that makes calls. Computers are becoming an integral part of daily life. And if people don't start designing them to be more user-friendly, then an even larger part of the population is going to be left out of even more stuff.

The payoff of a customer-centric approach to software and digital product design is substantial and long-lasting for both companies and their customers.

We're building what I call 'software apartheid.' We're in the process of creating a divided society: those who can use technology on one side, and those who can't on the other. And it happens to divide neatly along economic lines.

There's a fundamental problem with how the software business does things. We're asking people who are masters of hard-edged technology to design the soft, human side of software as well. As a result, they make products that are really cool - if you happen to be a software engineer.