1978 Mainframe vs. 2014 Mobile Phone
Here is a technical comparison of the Control Data Corporation mainframe computer I used at the Northwestern University Vogelback Computing Center in 1978 versus my Google Nexus 6 smart phone that I purchased at a T-Mobile store on 12/15/2014.
|CDC 6400||computer||Nexus 6|
|0.0500||CPU speed (GHz)||2.7000||54|
The product of all the factors of difference is 3.9 x 10^19.
And note that the CDC 6400 didn’t have GPS, Wi-Fi, LTE, a digital still camera (13mp+2mp), a digital video camera (4K), accelerometer, barometer, magnetometer (compass), ambient light sensor, etc.
And the CDC required dramatically more electricity to operate.