| A | B |
|---|
| Inventor of first telephone | Alexander Graham Bell |
| Year first telephone invented | 1886 |
| Company that developed first cell phone | Motorola |
| Inventor of mobile phone | Martin Cooper |
| Year mobile phone invented | 1973 |
| Cost of mobile phone in 1983 | $4,000 |
| Needed for cell phone to work | cells with communication towers |
| full-duplex | 2 frequencies working at the same time |
| cell | hexagon-shaped area with tower |
| resistive touchscreen | 2 layers, 1 with elec. current, changed by pressure |
| capacitive touchscreen | elec. charges in a grid, changed by touch |
| Foxconn | Chinese maker of iPhones |
| time to make one ipad | 5 days |
| length of work day/shift | 12 hours |
| iPhone workers age | teens and 20-year-olds |
| wage for Foxconn worker | $1.73 |
