Reliable and transparent programs are usually not in the interest of the designer.

Clearly, programming courses should teach methods of design and construction, and the selected examples should be such that a gradual development can be nicely demonstrated.

Reliable and transparent programs are usually not in the interest of the designer.

Experience shows that the success of a programming course critically depends on the choice of these examples.

Software gets slower faster than hardware gets faster.

Our ultimate goal is extensible programming. By this, we mean the construction of hierarchies of modules, each module adding new functionality to the system.

My being a teacher had a decisive influence on making language and systems as simple as possible so that in my teaching, I could concentrate on the essential issues of programming rather than on details of language and notation.