A challenge to the designers of the world: Make signs unnecessary.

Also note that invariably when we design something that can be used by those with disabilities, we often make it better for everyone

If you think of the product as a service, then the separate parts make no sense - the point of a product is to offer great experiences to its owner, which means that it offers a service. And that experience, that service, comprises the totality of its parts: The whole is indeed made up of all of the parts. The real value of a product consists of far more than the product's components.

Technology may change rapidly, but people change slowly. The principals [of design] come from understanding of people. They remain true forever.

A challenge to the designers of the world: Make signs unnecessary.

Scientists are always skeptics.

When a device as simple as a door has to come with an instruction manual—even a one-word manual—then it is a failure, poorly designed.