Explore notable examples of interaction design, the points of contact between objects—whether machines, apps, or entire infrastructures—and people. Watch video games  such as Tetris and Pac-Man, to immersive explorations of the natural world, like Flower, and  records of indigenous traditions and culture, like Never Alone. Works ranges from the iconic and universal @ sign, a symbol dating back to the Middle Ages, to an ad hoc device that allows a graffiti artist with ALS to tag city walls from their bed.No ticket needed to access this gallery on the first floor.See our complete guide to MoMA.