“An object in OOA represents a single typical but unspecified instance of something in the real world - any airplane, I don't care which one, as long as it is typical. The object-oriented analyst distinguishes this concept from that of a specified instance: Airplane number N2713A, Air Force One, or The Spirit of St. Louis, for example.”

— Sally Shlaer

Source: Object-Oriented Systems Analysis: Modeling the World In Data (1988), p. 12

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

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Sally Shlaer 2

American computer scientist 1938–1998

Stephen J. Mellor (1952) British computer scientist

Source: Object-Oriented Systems Analysis: Modeling the World In Data (1988), p. 12.

“OOA - Object-Oriented Analysis - is based upon concepts that we first learned in kindergarten: objects and attributes, wholes and parts, classes and members.”

Peter Coad (1953) American software entrepreneur

Peter Coad & Ed Yourdon (1991, p. 1); cited in: Sten Carlsson and Benneth Christiansson. (1999) " The Concept of Object and its Relation to Human Thinking: Some Misunderstandings Concerning the Connection between Object-Orientation and Human Thinking http://www.vits.org/publikationer/dokument/289.pdf." Informatica, Lith. Acad. Sci. 10.2. p. 147-160.

“OOA - Object-Oriented Analysis - is based upon concepts that we first learned in kindergarten: objects and attributes, wholes and parts, classes and members.”

Ed Yourdon (1944–2016) American software engineer and pioneer in the software engineering methodology

Source: Object-oriented design (1991), p. 1; cited in: Sten Carlsson and Benneth Christiansson. (1999) " The Concept of Object and its Relation to Human Thinking: Some Misunderstandings Concerning the Connection between Object-Orientation and Human Thinking http://www.vits.org/publikationer/dokument/289.pdf." Informatica, Lith. Acad. Sci. 10.2. p. 147-160.

“Object-oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each of which represents an instance of some class, and whose classes are all members of a hierarchy of classes united via inheritance relationships.”

Grady Booch (1955) American software engineer

Source: Object-oriented design: With Applications, (1991), p. 35

“I have a feeling that sooner or later I shall arrive at something legitimate, only I must begin, not with hypotheses, but with specific instances, no matter how minute. If I then succeed in distinguishing a clear structure, I get more from it than from a lofty imaginary construction. And the typical will automatically follow from a series of examples.”

Paul Klee (1879–1940) German Swiss painter

Quote (Bern, April 1902), as cited in Artists on Art, from the 14th – 20th centuries, ed. Robert Goldwater and Marco Treves; Pantheon Books, 1972, London, p. 442
1895 - 1902

“Object-oriented domain analysis seeks to identify reusable items localized around objects e. g., classes, instances, systems of interacting objects, and kits.”

Edward V. Berard

Source: Essays on object-oriented software engineering (1993), p. 185

“Asimov: Battlestar Galactica for instance, started off with twenty to thirty minutes of space battles which looked exactly like air battles in World War I. You could swear that the space ships were surrounded by air the way the maneuvered. One felt it was unworthy.
SWA Magazine: The Vipers in Battlestar Galactica look like jets. Is this a realistic design for the future?
Asimov: It is as if people in the 1880s were writing fantasy stories about airplanes of the future and they had the pilots lean back at the wheel and yell "whoa" and the airplane came to a halt in mid-air.”

Isaac Asimov (1920–1992) American writer and professor of biochemistry at Boston University, known for his works of science fiction …

An Interview with Isaac Asimov (1979)

“Whereas object-oriented analysis typically focuses upon one specific problem at a time, domain analysis seeks to identify the classes and objects that are common to all applications within a given domain, such as missile avionics systems, compilers, or accounting software.”

Grady Booch (1955) American software engineer

Source: Object-oriented design: With Applications, (1991), p. 142

“I don't think that anybody could have predicted that these people would take an airplane and slam it into the World Trade Center, take another one and slam it into the Pentagon, that they would try to use an airplane as a missile”

Condoleezza Rice (1954) American Republican politician; U.S. Secretary of State; political scientist

Press conference http://www.usatoday.com/news/washington/2004-03-30-questions-usat_x.htm, May 16, 2002.

“Objects are the real and conceptual things we find in the world around us. An object may be hardware, software, a concept (e. g., velocity), or even "flesh and blood." Objects are complete entities, i. e., they are not "simply information" or "simply information and actions." Software objects strive to capture as completely as possible the characteristics of the "real world" objects which they represent. Finally, objects are "black boxes," i. e., their internal implementations are hidden from the outside world, and all interactions with an object take place via a well-defined interface.”

Edward V. Berard

Source: Essays on object-oriented software engineering (1993), p. 335; as cited in Edward V. Berard (1995) " A Comparison of Object-Oriented Development Methodologies http://www.ipipan.gda.pl/~marek/objects/TOA/OOMethod/mcr.html". The Object Agency, Inc.

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