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Denning, Peter J.; Brown, Robert L. – Scientific American, 1984
A computer operating system spans multiple layers of complexity, from commands entered at a keyboard to the details of electronic switching. In addition, the system is organized as a hierarchy of abstractions. Various parts of such a system and system dynamics (using the Unix operating system as an example) are described. (JN)
Descriptors: Computer Oriented Programs, Computer Science, Computer Software, Computers
Corcoran, Elizabeth – Scientific American, 1989
Described is hypermedia including computers, videodisks, and monitors. Classroom and industry applications are discussed. Some criticism and issues involving the hypermedia are summarized. (YP)
Descriptors: Communications, Computer Oriented Programs, Computer Uses in Education, Computers
