The electromechanical Zuse Z3, completed in 1941, was the world's first programmable computer, and by modern standards one of the first machines that could be considered a complete computing machine. Д®lectronic computers, using either relays or valves, began to appear in the early 1940s.

Comparable geared devices did not emerge in Europe until the 16th century, and it was not until 1645 that the first mechanical calculator capable of performing the four basic arithmetical operations was developed. The Antikythera mechanism, dating from about the beginning of the first century BC, is generally considered to be the earliest known mechanical analog computer, and the earliest known geared mechanism. This is the Antikythera mechanism, which is considered the first mechanical analog computer, dating back to the first century BC.Дevices have been used to aid computation for thousands of years, probably initially in the form of a tally stick. This article focuses on the most recent period (electronic). Д«ased on the storage and processing technologies employed, it is possible to distinguish four distinct phases of IT development: pre-mechanical (3000 BC вЂ“ 1450 AD), mechanical (1450вЂ“1840), electromechanical (1840вЂ“1940), and electronic (1940 to present). Several products or services within an economy are associated with information technology, including computer hardware, software, electronics, semiconductors, internet, telecom equipment, and e-commerce. The term is commonly used as a synonym for computers and computer networks, but it also encompasses other information distribution technologies such as television and telephones. We shall call it information technology (IT).' Their definition consists of three categories: techniques for processing, the application of statistical and mathematical methods to decision-making, and the simulation of higher-order thinking through computer programs. Whisler commented that 'the new technology does not yet have a single established name. However, the term information technology in its modern sense first appeared in a 1958 article published in the Harvard Business Review authors Harold J. Humans have been storing, retrieving, manipulating, and communicating information since the Sumerians in Mesopotamia developed writing in about 3000В BC. An information technology system ( IT system) is generally an information system, a communications system, or, more specifically speaking, a computer system вЂ“ including all hardware, software, and peripheral equipment вЂ“ operated by a limited group of IT users. IT is considered to be a subset of information and communications technology (ICT). IT is typically used within the context of business operations as opposed to personal or entertainment technologies. Information technology ( IT) is the use of computers to create, process, store, retrieve, and exchange all kinds of electronic data and information.

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