Appendices

the authors’ teaching of TEI across several decades, each have engaged a vari­ ety of commercial and custom technologies toward facilitating student projects. One of these, Enodia tangibles—designed in part specifically toward this book—is summarized here at more length. These are accompanied by open source (for non­ commercial use) resources for virtual and physical reproduction. Facets of these artifacts are discussed within the main book (e.g., Section 1.5 and Chapter 5). Fig­ ure A.1 provides several views of these tangibles, with features ranging from 1mm to 10m scale and contexts from wearable to habitable. The tangibles illustrated in Figures A.1–A.18 began at the Dagstuhl Seminar (19232), on Ubiquitous Computing Education held in June 2019. Stimulated by the hexagonal-tiled “Settlers of Catan” (of which more than 30 million copies have been sold in more than 40 languages), the COMB hexagonal tangible tiles of Rossmy and Wiethoff [2018, 2019], and a Dagstuhl set of hexagonal sticky-notes, Ullmer, Shaer, Konkel, Rinott, Mills, and Zeamer illustrated a set of hexagonal tiles express­ ing ubiquitous computing educational concepts (Figure A.2(a)). When extruded into 3D space, such hexagonal tiles suggested enhanced manipulability (including toward collaboration) and supplementary visual real estate on their sides (Fig­ ure A.2(b)). Figure A.2(c) depicts a 3D printed physical prototype co-designed with Dr. Alexandre Siqueira, including integrated electronics for internal illumination. Shaer suggested the use of such tokens to interactively represent and manipulate facets of this book. With support from the US NSF “Enodia” MRI (major research instrumentation) funding, Ullmer and team began to operationalize this idea, including integrating Appendices