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HPT evolution
![ISSP Logo white UN.jpg](https://static.wixstatic.com/media/b26383_8555a9415dd7425a82a9af88d5f3612b~mv2.jpg/v1/fill/w_97,h_86,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/ISSP%20Logo%20white%20UN.jpg)
![ISSP Logo white UN.jpg](https://static.wixstatic.com/media/b26383_8555a9415dd7425a82a9af88d5f3612b~mv2.jpg/v1/fill/w_90,h_86,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/ISSP%20Logo%20white%20UN.jpg)
Key Contributors
Click on the pictures to learn more about them - Clicke en las imagenes para conocer mas sobre ellos
Roger Kaufman
L. Von Bertalanffy
Jane Jacobs
Rachel Carson
John Muir
Tim Berners Lee
Thomas Edison
Henry J Kaiser
Daniel Kahneman
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