•Walking on water and developing software from a specification are easy if both are frozen.

•Software and hard drugs are the only two professions that refer to their customers as 'users'.

•Software is the only engineering discipline in which the equivalent of changing the wing on an airplane constitutes maintenance.

•The cost of adding a feature isn't just the time it takes to code it. The cost also includes the addition of an obstacle to future expansion.The trick is to pick the features that don't fight each other.

•There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies.

•A factor present in every successful project and absent in every unsuccessful project is sufficient attention to requirements.

•The first 90% of the software code takes 90% of the development time.
The remaining 10% of the code takes up the other 90% of the time.