Any inaccuracies in this index may be explained by the fact that it has been prepared with the help of a computer.

I define UNIX as 30 definitions of regular expressions living under one roof.

The whole thing that makes a mathematician’s life worthwhile is that he gets the grudging admiration of three or four colleagues.

...One of the most important lessons, perhaps, is the fact that SOFTWARE IS HARD. From now on I shall have significantly greater respect for every successful software tool that I encounter. During the past decade I was surprised to learn that the writing of programs for TeX and Metafont proved to be much more difficult than all the other things I had done (like proving theorems or writing books). The creation of good software demand a significiantly higher standard of accuracy than those other things do, and it requires a longer attention span than other intellectual tasks.

AI has by now succeeded in doing essentially everything that requires 'thinking' but has failed to do most of what people and animals do 'without thinking'-that, somehow, is much harder.

Any inaccuracies in this index may be explained by the fact that it has been prepared with the help of a computer.

Science is what we understand well enough to explain to a computer. Art is everything else we do.