The greatest danger to good computer science research today may be excessive relevance. Evidence for the worldwide fascination with computers is ever… - Dennis M. Ritchie

My own computational world is a strange blend of Plan 9, Windows, and Inferno. I very much admire Linux's growth and vigor. Occasionally, people ask me much the same question [about Linux], but posed in a way that seems to expect an answer that shows jealousy or irritation about Linux vs. Unix as delivered and branded by traditional companies. Not at all; I think of both as the continuation of ideas that were started by Ken and me and many others, many years ago.

The working examples of important new systems seem to have come either from entrepreneurial efforts (Visicalc is a good example) or from large companies, like Bell Labs and most especially Xerox, that were much involved with computers and could afford research into them, but did not regard them as their primary business.

Computer science research is different from these more traditional disciplines. Philosophically it differs from the physical sciences because it seeks not to discover, explain, or exploit the natural world, but instead to study the properties of machines of human creation. In this it as analogous to mathematics, and indeed the "science" part of computer science is, for the most part mathematical in spirit. But an inevitable aspect of computer science is the creation of computer programs: objects that, though intangible, are subject to commercial exchange.