Select a task (besides driving) that you do on a regular basis that has become invisible by learning; that is, an interface that you used to spend a lot of time thinking about, but now ignore in favor of focusing on the task. Feel free to choose a task you perform that does not currently have a computational interface (such as a cookbook and thermometer or hand-written spreadsheet). First, describe the components of the interface you used to think about a lot. Then, describe your thought process now, and especially explain why you no longer have to spend as much time focusing on the interface. Finally, briefly describe how you might design or redesign the computational interface to get you to the point of invisibility more quickly. Hint: This question is best-suited for an interface with which you are now an expert despite some early difficulty. Many video games demonstrate this type of learning curve, as do many pieces of software for complex tasks. You may also think outside the box: perhaps you used to struggle with cooking or budgeting but have since gotten better.