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Image from page 242 of “Bell telephone magazine” (1922)
Image by Internet Archive Book Images
Identifier: belltelephone6667mag00amerrich
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: [New York, American Telephone and Telegraph Co., etc.]
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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About This Book: Catalog Entry
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Text Appearing Before Image:
1957 and again in 1960,the amount of debt financing last yearreached an all-time high. Interest cost to Bell System com-panies varied from a low of 4.85 percent for a New York Telephone Com-pany offering in January to 6.03 percent that Pacific Telephone is payingfor a 0 million issue sold in No-ember. Other Bell System companies whichsold bonds last year include Ohio,Chesapeake and Potomac of Virginia,Mountain States, Southwestern,Chesapeake and Potomac of Wash-ington (D.C.), Northwestern, South-ern, and Southern New England. Inaddition, AT&T sold two 0 millionissues in 1966. Cardboard Computer Bell Telephone Laboratories has de-veloped a novel computer to helpstimulate high school students inter-est in physics. The CARDboard Illus-trative Aid to Computation — calledCARDIAC, for short — is a cardboardmodel which has the basic workingparts of an actual digital computer. It was designed by David W. Hagei-barger, a member of the InformationProcessing Research Departmentat

Text Appearing After Image:
Bell Laboratories, for use in The Man-Made World, a new program de-signed to improve the teaching of highschool science. With the aid of CARDIAC, studentsare becoming aware of the computer,not as a thinking machine, but as amachine responsive to mans instruc-tions. By following a red line path onthe plastic and cardboard model, stu-dents can follow steps taken by a com-puter in executing programs and canuse CARDIAC to solve problems. Theycan perform logical operations and seehow abstract concepts of logic can bemade concrete in circuits similar tothose used in computers. Thus, the cardboard computer givesthe student a working illustration ofprinciples discussed in Logic andComputers, the first phase of the ex-perimental course which was preparedby contributors to the EngineeringConcepts Curriculum Project. Five BellLabs engineers and scientists, profes-sors from a number of universities,and several high school science teach-ers are among those contributing tothe experiment, which is s

Note About Images
Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability – coloration and appearance of these illustrations may not perfectly resemble the original work.

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