Table of Contents
Software Above the Level of a Single Device: The Implications..... 1
Multiple Smart Things 2
Importance of Human Input 4
Implicit Versus Explicit Input 5
Types of Sensors 6
The System as a User Interface 6
A Network of Devices 7
The Robustness Principle 8
Software Above the Level of a Single Device 9
System of Interaction 9
How the World “Should” Work 10
Think About Things That Seem Hard 11
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