Featured Image: Detail of Google Glass Explorer Edition XE-C 2.0 Optical Display Device, 2013; Design Director: Isabelle Olsson (Swedish, born 1983); Manufactured by Google X (Mountain View, California, USA); Titanium, plastic, steel, electronic components, LED, silicon, liquid crystal, carbon, glass, copper; H × W × D: 2.5 × 13.5 × 21 cm (1 × 5 5/16 × 8 1/4 in.); Gift of Robert M. Greenberg, 2017-51-13-a/e