Artificial intelligence has the same relation to intelligence as artificial flowers have to flowers.

Requirements in mathematical language are no use unless they are easier to read than the code.

We must not forget that the wheel is reinvented so often because it is a very good idea; I've learned to worry more about the soundness of ideas that were invented only once.

As a rule, software systems do not work well until they have been used, and have failed repeatedly, in real applications.

One bad programmer can easily create two new jobs a year.

Complexity is not a goal. I don't want to be remembered as an engineer of complex systems.

When someone builds a bridge, he uses engineers who have been certified as knowing what they are doing. Yet when someone builds you a software program, he has no similar certification, even though your safety may be just as dependent upon that software working as it is upon the bridge supporting your weight.