Object-oriented programming: Difference between revisions

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[[File:oop-uml-class-example.png|frame|right|[[Unified Modeling Language|UML]] notation for a class. This Button class has [[Variable (computer science)|variables]] for data, and [[Method (computer programming)|functions]]. Through inheritance a subclass can be created as subset of the Button class. Objects are instances of a class.]]

Terminology invoking "objects" in the modern sense of object-oriented programming made its first appearance at [[MIT]] in the late 1950s and early 1960s. In the environment of the [[artificial intelligence]] group, as early as 1960, "object" could refer to identified items ([[Lisp (programming language)|LISP]] atoms) with properties (attributes);<ref>{{Cite journal |last1=McCarthy |first1=J. |last2=Brayton |first2=R. |author2-link=Robert Brayton (computer scientist) |last3=Edwards |first3=D. |author3-link=Daniel Edwards (programmer) |last4=Fox |first4=P. |author4-link=Phyllis Fox |last5=Hodes |first5=L. |author5-link=Louis Hodes |last6=Luckham |first6=D. |author6-link=David Luckham |last7=Maling |first7=K. |author7-link=Klim Maling (programmer) |last8=Park |first8=D. |author8-link=David Park (computer scientist) |last9=Russell |first9=S. |author9-link=Steve Russell (computer scientist) |date=March 1969 |title=LISP I Programmers Manual |url=http://history.siam.org/sup/Fox_1960_LISP.pdf |url-status=dead |journal=Computation Center and Research Laboratory of Electronics |publisher=Artificial Intelligence Group, [[M.I.T. Computation Center]] and Research Laboratory |page=88f |archive-url=https://web.archive.org/web/20100717111134/http://history.siam.org/sup/Fox_1960_LISP.pdf |archive-date=17 July 2010 |quote=In the local M.I.T. patois, association lists [of atomic symbols] are also referred to as "property lists", and atomic symbols are sometimes called "objects". |place=[[Boston]], [[Massachusetts]]}}</ref><ref>{{Cite book

|last1=McCarthy

|first1=J.

|last2=Brayton

|first2=R.

|author2-link=Robert Brayton (computer scientist)

|last3=Edwards

|first3=D.

|author3-link=Daniel Edwards (programmer)

|last4=Fox

|first4=P.

|author4-link=Phyllis Fox

|last5=Hodes

|first5=L.

|author5-link=Louis Hodes

|last6=Luckham

|first6=D.

|author6-link=David Luckham

|last7=Maling

|first7=K.

|author7-link=Klim Maling (programmer)

|last8=Park

|first8=D.

|author8-link=David Park (computer scientist)

|last9=Russell

|first9=S.

|author9-link=Steve Russell (computer scientist)

|title=LISP I Programmers Manual

|place=[[Boston]], [[Massachusetts]]

|publisher=Artificial Intelligence Group, [[M.I.T. Computation Center]] and Research Laboratory

|date=March 1969

|page=88f

|url=http://history.siam.org/sup/Fox_1960_LISP.pdf

|quote=In the local M.I.T. patois, association lists [of atomic symbols] are also referred to as "property lists", and atomic symbols are sometimes called "objects".

|url-status=dead

|archive-url=https://web.archive.org/web/20100717111134/http://history.siam.org/sup/Fox_1960_LISP.pdf

|archive-date=17 July 2010

}}</ref><ref>{{Cite book

|url = https://archive.org/details/lisp15programmer00john/page/105

|title = LISP 1.5 Programmer's Manual