DEC, 1968, 1971; 78 pages, diagrams.
Condition: Very Good to near fine, red cardstock covers, softcover, titles in white; slight shelfwear at corners and edges. The binding is tight, pages clean and unmarked although toned with age and paper acidity.
Item DescriptionChapters and sections include, Communication Theory; Communication Systems; Communication Facilities -- The Bell System, Wide area telephone service WATS; DATAPHONE services, TWX teletype, Western Union, voice grade channels, broad band channels;
Data Communication -- pulsed codes and digital data communication; Data Communication techniques and systems; Digital Communication Codes and Formats -- Baudot Code; ASCII Code, Hollerith Code and MORE; includes appendices.