Picture Credits

p2 Reproduced with permission of Theodor Nelson. p8-9 © Collections de la Fédération Wallonie-Bruxelles mises en dépôt au Mundaneum à Mons (Belgique). p10 tc Courtesy of the National Physical Laboratory; tr Courtesy of the RAND Corporation. p11 Johnson Space Center/NASA. p12 Library of Congress, Washington, D.C. p13 U.S. Department of Energy. p14 cr Private Collection; b Science & Society/SuperStock. p15 Photo by Dale Heatherington. p16 Reprinted with permission of MIT Lincoln Laboratory, Lexington, Massachusetts. p18 tl © 2013 Apple Inc. All rights reserved; tr Jonathan Zufi. cl Apic/Getty Images. p19 Private Collection. p20 Jeremy Graston/123RF. p21 From the Collection of the Salisbury House Foundation Rare Books Library, Des ...

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