Frank Gillette, »Track/Trace«, 1972 / 2017, Closed-circuit video installation (digital reconstruction); 15 tube monitors, 3 network cameras, 5 computers: Raspberry Pi 3B+, operating system: Raspian, programming language: C / GStreamer, 5 micro SD cards Wooden construction, dimensions variable. ZKM | Center for Art and Media © Frank Gillette; Photo © ZKM | Center for Art and Media, Photo: Franz J. Wamhof