Late 1970s - Present: Fourth Generation Computers Following the invention of the first integrated circuits always more and more components could be fitted onto one chip. LSI (Large Scale Integration) was followed by VLSI (Very Large Scale Integration) and ULSI (Ultra-Large Scale Integration), which increased the number of components squeezed onto one chip into the millions and helped diminish the size as well as the price of computers. The new chips took the idea of the integrated circuit one step further as they allowed to manufacture one microprocessor which could then be programmed to meet any number of demands. Also, ensuing the introduction of the minicomputer in the mid 1970s by the early 1980s a market for personal computers (PC) was established. As computers had become easier to use and cheaper they were no longer mainly utilized in offices and manufacturing, but also by the average consumer. Therefore the number of personal computers in use more than doubled from 2 million in 1981 to 5.5 million in 1982. Ten years later, 65 million PCs were being used. Further developments included the creation of mobile computers (laptops and palmtops) and especially networking technology. While mainframes shared time with many terminals for many applications, networking allowed individual computers to form electronic co-operations. LANs (Local Area Network) permitted computers to share memory space, information, software and communicate with each other. Although already LANs could reach enormous proportions with the invention of the Internet an information and communication-network on a global basis was established for the first time.

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General Motors American corporation that was the world's largest automotive manufacturer and perhaps the largest industrial corporation throughout most of the 20th century. It was founded in 1908 to consolidate several motorcar companies and today operates manufacturing and assembly plants and distribution centers throughout the United States and Canada and many other countries. Its major products include automobiles and trucks, a wide range of automotive components, engines, and defense and aerospace material. In 1996 it sold Electronic Data Systems, and in 1997 it sold the defense units of its Hughes Electronics subsidiary to the Raytheon Company, thus leaving the computer-services and defense-aerospace fields in order to concentrate on its automotive businesses. The company's headquarters are in Detroit, Michigan.

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