What is Technology
da Caroline Liu
1. before class
1.1. Equipments we use
1.1.1. computer
1.1.2. cell phone
1.1.3. printer
1.2. Invisible data channels
1.2.1. WI-FI
1.2.2. TV cable
1.2.3. phone signal
1.3. Lifestyle
1.3.1. Automobile
1.3.2. Airplane