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In order to build a framework in which to discuss the evolution of data communications, the three main components of a basic data transmission system (source, medium and data sink) are considered to see what has happened in each area since 1960. This somewhat oversimplified basic approach is taken in order to avoid the confusing terminology and jargon which seem to haunt this field. The source can be any data source, including a computer system, which is transmitting data through a medium to a data sink. The medium is everything between the source and sink. The sink is often assumed to be a computer system but this is not necessarily true, since it can be a paper tape, punched cards or a central processor. The evolution of each of these three basic elements within the 10-year time frame is discussed in detail in the most elementary terms and graphically shown by figures and diagrams. A short glossary of data communications terminology is appended. (NH)

1Boy Crusoe

By Allan Eric

Also published as" A Yankee Crusoe" . A 15 year old hard working and studious farm boy finds the lure of adventure on the seas as a merchant seaman more than he can resist. This is his story. " I was born in a little town in the State of Maine, near the close of the Civil War. My boyhood life did not differ materially from that of the average farmer's son in the remote country districts of New England--except, perhaps, that I read more and thought more. Hard work on the rugged soil, two terms each year in the little yellow country schoolhouse, a day's fishing now and then filled the early years of my life full to over-flowing. " What he gets is enough excitement and adventure to overflow his wildest dreams. How he experiences disaster and uses his wits and knowledge to overcome every problem makes for a great read. - Summary by Phil Chenevert