Associative indexing, the basic idea of which is a provision whereby any item may be caused at will to select immediately and automatically another. This is the essential feature of the Memex. The process of tying two items together is the important thing.

A record, if it is to be useful to science, must be continuously extended, it must be stored, and above all it must be consulted.

If scientific reasoning were limited to the logical processes of arithmetic, we should not get very far in our understanding of the physical world

Fear cannot be banished, but it can be calm and without panic; it can be mitigated by reason and evaluation.

There will always be plenty of things to compute in the detailed affairs of millions of people doing complicated things.

The difficulty seems to be, not so much that we publish unduly in view of the extent and variety of present day interests, but rather that publication has been extended far beyond our present ability to make real use of the record.

There has been a great deal said about a 3,00-mile high-angle rocket. The people who have been writing these things that annoy me, have been talking about a 3,000-mile high-angle rocket shot from one continent to another, carrying an atomic bomb and so directed as to be a precise weapon which would land exactly on a certain target, such as a city.