Mediocre design provably wastes the world's resources, corrupts the environment, affects international competitiveness. Design is important.

The fundamental problem with program maintenance is that fixing a defect has a substantial (20-50 percent) chance of introducing another. So the whole process is two steps forward and one step back.

When a task cannot be partitioned because of sequential constraints, the application of more effort has no effect on the schedule. The bearing of a child takes nine months, no matter how many women are assigned.

Scientists build to learn; Engineers learn to build.

The brain alone is intricate beyond mapping, powerful beyond imitation, rich in diversity, self-protecting, and self-renewing. The secret is that it is grown, not built.

The bearing of a child takes nine months, no matter how many women are assigned.

Conceptual integrity is the most important consideration in system design.