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in the late 1950s and early 1960s. Here, "object" referred to LISP atoms with identified properties (attributes).Another early example was Sketchpad created by Ivan Sutherland at MIT in 1960-1961. In the glossary of his technical report, Sutherland defined terms like "object" and "instance" (with the class concept covered by "master" or "definition"), albeit specialized to graphical interaction. Later, in 1968,

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