“Present-day applications are rather different in many respects. Present-day programs are often very large and are being developed by teams that collaborate over periods spanning several years. These teams may be scattered across the globe. The programmers are not the future users of the system they develop and they have no expert knowledge of the application area in question. The problems that are being tackled increasingly concern everyday life: automatic bank tellers, airline reservation, salary administration, electronic commerce, automotive systems, etc. Putting a man on the moon was not conceivable without computers.”

—  Hans van Vliet

Source: Software Engineering: Principles and Practice, 2007, p. 2

Adopted from Wikiquote. Last update June 3, 2021. History

Help us to complete the source, original and additional information

Do you have more details about the quote "Present-day applications are rather different in many respects. Present-day programs are often very large and are being…" by Hans van Vliet?
Hans van Vliet photo
Hans van Vliet 5
Dutch computer scientist 1949

Related quotes

“In addition to technical problems, systems also have organizational and logistical problems. Many different people may be involved over a wide physical or geographic coverage and over a long period of time. Many may work for different companies or organizations with different rules and methods of operating. Very many data and much knowledge are involved. The organizational problem concerns itself with the question of how all these people can work together most effectively for the common purpose.”

Harold Chestnut (1917–2001) American engineer

Source: Systems Engineering Tools, (1965), Systems Engineering Methods (1967), p. 24; First paragraph of Ch. 2. System Organization, Scheduling, and Record-Keeping

“Computer science is still a young field. The first computers were built in the mid 1940s, since when the field has developed tremendously. Applications from the early years of computerization can be characterized as follows: the programs were quite small, certainly when compared to those that are currently being constructed; they were written by one person; they were written and used by experts in the application area concerned. The problems to be solved were mostly of a technical nature, and the emphasis was on expressing known algorithms efficiently in some programming language. Input typically consisted of numerical data, read from such media as punched tape or punched cards. The output, also numeric, was printed on paper. Programs were run off-line. If the program contained errors, the programmer studied an octal or hexadecimal dump of memory. Sometimes, the execution of the program would be followed by binary reading machine registers at the console.”

Hans van Vliet (1949) Dutch computer scientist

Source: Software Engineering: Principles and Practice, 2007, p. 2

“I am afraid that I do not believe that any body of men can have enough knowledge of the past, the present and the future to establish “development priorities” — which presumably means procuring some developments as being good and prohibiting others as being bad.”

John James Cowperthwaite (1915–2006) British colonial administrator

March 27, 1968, page 212.
Official Report of Proceedings of the Hong Kong Legislative Council

M. S. Swaminathan photo

“Developing countries can leapfrog several stages in the development process through the application of bio-technology in agriculture”

M. S. Swaminathan (1925) Indian scientist

From [Prasad, Jagdish, Prasad, Arbind, Development Planning for Agriculture: Policies, Economic Implications, Inputs, Production and Marketing, http://books.google.com/books?id=d_eGATn4SHIC&pg=PA93, 1994, Mittal Publications, 978-81-7099-569-2, 93–]

“In our time of ever-increasing specialization, there is a tendency to concern ourselves with relatively narrow scientific problems. The broad foundations of our present-day scientific knowledge and its historical development tend to be forgotten too often. This is an unfortunate trend, not only because our horizon becomes rather limited and our perspective somewhat distorted, but also because there are many valuable lessons to be learned in looking back over the years during which the basic concepts and the fundamental laws of a particular scientific discipline were first formulated.”

Emil Wolf

in Einstein's Researches on the Nature of Light, [Emil Wolf, Selected works of Emil Wolf: with commentary, World Scientific, 2001, 9810242042, 536]

E. W. Hobson photo

“A great department of thought must have its own inner life, however transcendent may be the importance of its relations to the outside. No department of science, least of all one requiring so high a degree of mental concentration as Mathematics, can be developed entirely, or even mainly, with a view to applications outside its own range. The increased complexity and specialisation of all branches of knowledge makes it true in the present, however it may have been in former times, that important advances in such a department as Mathematics can be expected only from men who are interested in the subject for its own sake, and who, whilst keeping an open mind for suggestions from outside, allow their thought to range freely in those lines of advance which are indicated by the present state of their subject, untrammelled by any preoccupation as to applications to other departments of science. Even with a view to applications, if Mathematics is to be adequately equipped for the purpose of coping with the intricate problems which will be presented to it in the future by Physics, Chemistry and other branches of physical science, many of these problems probably of a character which we cannot at present forecast, it is essential that Mathematics should be allowed to develop freely on its own lines.”

E. W. Hobson (1856–1933) British mathematician

Source: Presidential Address British Association for the Advancement of Science, Section A (1910), p. 286; Cited in: Moritz (1914, 106): Modern mathematics.

Carl von Clausewitz photo

“Knowledge in war is very simple, being concerned with so few subjects, and only with their final results at that. But this does not make its application easy.”

Carl von Clausewitz book On War

On War (1832), Book 2

“The adverse impact on development productivity of requiring programmers to navigate along access paths to reach target data […] was enormous. In addition, it was not possible to make slight changes in the layout in storage without simultaneously having to revise all programs that relied on the previous structure. […] As a result, far too much manpower was being invested in continual (and avoidable) maintenance of application programs.”

E. F. Codd (1923–2003) computer scientist

Relational Database: A Practical Foundation for Productivity (1982)

Frank Macfarlane Burnet photo

“I can see no hope at present of such a vaccine being produced… I have adopted a frankly defeatist attitude towards the problem of poliomyelitis and I hope that future developments will prove me wrong… No means of controlling poliomyelitis is at present visible.”

Frank Macfarlane Burnet (1899–1985) Australian virologist

Burnet, F.M. (1949) "Some aspects of the epidemiology of poliomyelitis". in: Proc. Royal Australasian College of Physicians. 4: 95-100.
Quote from 1949 on the development of a poliomyelitis vaccine, which was developed later that year.

Arthur Kekewich photo

“Decisions in the American Courts are entitled to great respect, but are not binding here; and there are many circumstances affecting questions arising between the laws of different States which may or may not be applicable to questions arising here.”

Arthur Kekewich (1832–1907) British judge

In re De Nicols. De Nicols v. Curlieb (1898), L. R. 1 C. D. [1898], p. 410.

Related topics