The first interface that spread for AI tools was the chat window. That makes sense. When you don't know what something can do, the safest approach is to let people ask. A conversation feels familiar, it stretches across many situations, and it doesn't force a specific structure up front.

What happens in interaction is mutually determined by the human and the computer. In other words, what happens in interaction cannot be attributed solely to the human or the computer—the two must be considered together.

Phenomena in interaction are emergent, that is, they are not attributable to the user or to the computer alone.

Interaction is a dynamic phenomenon that unfolds over time as users and computers influence each other.

What happens in interaction cannot be attributed solely to the human or the computer—the two must be considered together.

Interaction is a core notion in HCI and refers to the mutual influence between people and computers.