This talk is about a particular kind of media, which is "media for thinking in." And it's about a particular kind of thinking, which is understanding systems.

"Science" is understanding a system in the world. "Engineering" is building a system in the world, where the challenge is often understanding what we're building.

Media are our thinking tools. Our representations of a system are how we understand it.

To understand or build new complex systems, we need powerful new representations, and we need a powerful new medium in which to work with these representations.

Today's representations were designed for the medium of paper. This talk will show examples of new representations for systems, and offer hints as to what a new medium might be like.