TABLE OF CONTENTS CHAPTER 1 An All-in-One Device CHAPTER 2 Sending Signals CHAPTER 3 Smartphone Parts HOW IT WORKS Touchscreen CHAPTER 4 Tying It All Together CHAPTER 5 What’s Next Focus on Smartphones Index Glossary To Learn More
CHAPTER 1 AN ALL-IN-ONE DEVICE A soccer coach snaps a team photo and shares it on social media Then she texts the players their new schedule She can do all this with just a smartphone Smartphones are cell phones with computers inside Early cell phones used analog signals to copy sound vibrations They could only send voice messages Smartphones can make calls send messages connect to the Internet and more 5
