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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Netiquette Although referred to as a single body of rules, there is not just one Netiquette, but there are several, though overlapping largely. Proposing general guidelines for posting messages to newsgroups and mailing lists and using the World Wide Web and FTP, Netiquettes address civility topics (i.e., avoiding hate speech) and comprise technical advises (i.e., using simple and platform-independent file formats). Well-known Netiquettes are the Request for Comment #1855 and The Net: User Guidelines and Netiquette by Arlene H. Rinaldi. ftp://ftp.isi.edu/in-notes/rfc1855.txt http://www.fau.edu/netiquette/net/index.html

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