Information Science
-- a two part series focussing in basic principles of telecommunications - part 1 uses an oscilloscope to explain the difference between data and signals, while part2 discusses the components of a data communication system including computers, modems and networks.
Under a distribution contract with Pennsylvania State University's Continuing Education Audio Visual Services.
1991 Part1 Lib Cong #PA 745-266
1991 Part2 Lib Cong #PA 745-268