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A diagram titled "Key Layers of the Internet" showing the development of internet technologies through layered categories. Each layer lists early milestones on the left and later milestones on the right. The layers from bottom to top are: COMPUTERS Early: Z3 (1941), Konrad Zuse Milestone: 1976 - Apple, Jobs & Wozniak NETWORKS Early: SAGE (1956), George Valley Milestone: 1973 - Ethernet, Robert Metcalfe INTERNET Early: ARPANET (1969), J.C.R. Licklider Milestone: 1975 - TCP/IP, Cerf & Kahn WORLD WIDE WEB Early contributors: Vannevar Bush, Ted Nelson, Douglas Engelbart Milestone: 1990 - http://, Tim Berners-Lee BROWSERS Early: DOS Houdini (1986), Neil Larson Milestone: 1993 - Mosaic, Marc Andreessen SEARCH ENGINE Early: Archie (1990), Emtage & Deutsch Milestone: 1998 - Google, Brin & Page CONTENT Early: email (1971), Ray Tomlinson Milestone: 1987 - HyperCard, Bill Atkinson

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Andrei is a science communicator and a PhD candidate in geophysics. He is the co-founder of ZME Science, where he published over 2,000 articles. Andrei tries to blend two things he loves (science and good stories) to make the world a better place -- one article at a time.

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