“Print has one supreme flaw: ink is indelible. [No matter how good the static design,] the reader has the challenge of visually or physically navigating through the entire data space to find the group of interest. The modern computer system provides the first visual medium in history to overcome this restriction. Liberating us from the permanence of publication is the undersung crux of the computer—the dynamic display screen. Its pixels are magic ink—capable of absorbing their context and reflecting a unique story for every reader. And the components surrounding the display—CPU, storage, network, input devices—are just peripherals for inferring context.