“The only real argument for monolithic systems was performance, and there is now enough evidence showing that microkernel systems can be just as fast as monolithic systems.”

—  Andrew S. Tanenbaum

In a Usenet message, 29 Jan 1992.
The "Linux is Obsolete" Debate

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Dutch computer scientist 1944

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Andrew S. Tanenbaum (1944) Dutch computer scientist

In a Usenet message to Linus Torvalds, 30 Jan 1992.
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“Most of our beliefs about complex organizations follow from one or the other of two distinct strategies. The closed-system strategy seeks certainty by incorporating only those variables positively associated with goal achievement and subjecting them to a monolithic control network. The open-system strategy shifts attention from goal achievement to survival and incorporates uncertainty by recognizing organizational interdependence with environment. A newer tradition enables us to conceive of the organization as an open system, indeterminate and faced with uncertainty, but subject to criteria of rationality and hence needing certainty.”

James D. Thompson (1920–1973) American sociologist

Source: Organizations in Action, 1967, p. 13 (in 2011 edition)

“Formulating consists of determining the system inputs, outputs, requirements, objectives, constraints. Structuring the system provides one or more methods of organizing the solution, the method of operation, the selection of parts, and the nature of their performance requirements. It is evident that the processes of formulating a system and structuring it are strongly related.”

Harold Chestnut (1917–2001) American engineer

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“The systems approach to problems focuses on systems taken as a whole, not on their parts taken separately. Such an approach is concerned with total- system performance even when a change in only one or a few of its parts is contemplated because there are some properties of systems that can only be treated adequately from a holistic point of view. These properties derive from the relationship between parts of systems: how the parts interact and fit together”

Russell L. Ackoff (1919–2009) Scientist

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“Since it can be argued that both science and engineering are concerned with the study of real systems and their behavior, it follows that a general theory should be concerned with the study of general systems… It suffices for the present discussion to consider a general system as an abstract analogue or model of a class of real systems. General systems theory is then a theory of general models.”

Mihajlo D. Mesarovic (1928) Serbian academic

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“Because the Systems Age is teleologically oriented, it is preoccupied with systems that are goal-seeking or purposeful, that is, systems that can display choice of either means or ends, or both. It is interested in purely mechanical systems only.”

Russell L. Ackoff (1919–2009) Scientist

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“The purpose of this book is to discuss and present evidence for the general thesis that the flow of energy through a system acts to organize that system.”

Harold J. Morowitz (1927–2016) American biophysicist

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“Possibly the only real object-oriented system in working order. (About Internet)”

Alan Kay (1940) computer scientist

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“We assert—and on the basis of the most recent socialist literature that you cannot deny—that the real history of capitalism is only now beginning, because capitalism is not just a system of oppression; it also represents a choice of value,…”

Benito Mussolini (1883–1945) Duce and President of the Council of Ministers of Italy. Leader of the National Fascist Party and subsequen…

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“If solutions could be offered within the existing system, there would be no need to design. Thus designers have to transcend the existing system. Their task is to create a different system or devise a new one. That is why designers say they can truly define the problem only in light of the solution. The solution informs them as to what the real problem is.”

Béla H. Bánáthy (1919–2003) Hungarian linguist and systems scientist

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