Abstract
Information technology (IT) is the integration of information processing and communication technologies. Automatic telecommunication technologies began with step-by-step switching systems, followed by crossbar switching systems, and then by switching systems controlled by computers with stored memory. Information processing and data processing were enhanced with the invention of computers, and then the more advanced technologies, such as AI and knowledge engineering, were developed. Communication technology and information processing technology are also based on computers with stored memory. Thus, advances in computer technology have advanced both information technology and communication technology. This has led to the integration of information processing technology and telecommunication technology—in other words, information technology.
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