Ferroxcube, 80 by 16-bit-word core memory plane. Core diameter 1.3 mm. All objects, except “Book of Prayers,” courtesy Gessler Collection. All photos Steve Rowell. As we move into the age of “ubiquitous computing,” information appears to be losing its materiality. Computation is increasingly hidden on microchips and sealed in plastic beyond the sizzling screens of our laptops, behind the stylish skins of our appliances, and under the hoods of our automobiles.