To assist us in the experience of time, external memory devices are used. The use of things or techniques that assist memory is probably as old as our humanness. At their most basic, memory devices can be physical artifacts that relate us to an experience. We even use our interaction with the environment itself as a form of memory, such as a broken branch or a trail marking our path through the forest (and potentially the way home). In modern times, technologies from writing to electronics have vastly expanded how we might “remember”.