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Robert Selman developed his developmental theory of role-taking ability based on four sources. [4] The first is the work of M. H. Feffer (1959, 1971), [5] [6] and Feffer and Gourevitch (1960), [7] which related role-taking ability to Piaget's theory of social decentering, and developed a projective test to assess children's ability to decenter as they mature. [4]
The earliest known tool for use in computation was the abacus, developed in the period between 2700 and 2300 BCE in Sumer. [3] The Sumerians' abacus consisted of a table of successive columns which delimited the successive orders of magnitude of their sexagesimal number system.
Developed an early fully transistorized computer, the Mailüfterl. Crucial in the creation of the formal definition of the programming language PL/I. 1938, 1945 Zuse, Konrad: Built the first digital freely programmable computer, the Z1. Built the first functional program-controlled computer, the Z3 in 1941. [59]
The first digital electronic computer was developed in the period April 1936 - June 1939, in the IBM Patent Department, Endicott, New York by Arthur Halsey Dickinson. [35] [36] [37] In this computer IBM introduced, a calculating device with a keyboard, processor and electronic output (display). The competitor to IBM was the digital electronic ...
During the early modern period, these legendary automata were said to possess the magical ability to answer questions put to them. The late medieval alchemist and proto-Protestant Roger Bacon was purported to have fabricated a brazen head , having developed a legend of having been a wizard.
The later Stone Age, during which the rudiments of agricultural technology were developed, is called the Neolithic period. During this period, polished stone tools were made from a variety of hard rocks such as flint , jade , jadeite , and greenstone , largely by working exposures as quarries, but later the valuable rocks were pursued by ...
The Information Age [a] is a historical period that began in the mid-20th century.It is characterized by a rapid shift from traditional industries, as established during the Industrial Revolution, to an economy centered on information technology. [2]
The first known computer algorithm was written by Ada Lovelace in the 19th century for the Analytical Engine, to translate Luigi Menabrea's work on Bernoulli numbers for machine instruction. [3] However, this remained theoretical only - the lesser state of engineering in the lifetime of these two mathematicians proved insufficient [ citation ...