Works Referenced
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Engelbart, Douglas. “Augmenting Human Intellect: A Conceptual Framework.” In The New Media Reader, edited by Noah Wardrip-Fruin and Nick Montfort, 93–108. Cambridge, MA: MIT Press, 2003.

Irvine, Martin. “Introduction to Affordances and Interfaces: The Semiotic Foundations of Meanings and Actions with Cognitive Artefacts.” Unpublished manuscript, accessed November 2, 2016. Google Docs file.

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Sutherland, Ivan. “Sketchpad: A Man-Machine Graphical Communication System.” In The New Media Reader, edited by Noah Wardrip-Fruin and Nick Montfort, 109–126. Cambridge, MA: MIT Press, 2003.