Introduction essay by Lukas Feireiss for the book "A Touch of Code. Interactive Installations and Experiences" by Gestalten Publishers. The book is a collection of innovative works produced where virtual realms meet the real world and where dataflow confronts the human senses. It presents an international spectrum of interdisciplinary projects at the intersection of laboratory, trade show, and urban space that play with the new frontiers of perception, interaction, and staging created by current technology.