Author Grady Booch provides an audio recording of his On Computing column, in which he discusses how different ages of humanity have required different modes of thinking. We have progressed from the Cognitive Revolution to the Agricultural Revolution to the Industrial Revolution and now find ourselves in the Computational Revolution. Subscribe to the On Computing podcast on iTunes at https://itunes.apple.com/us/podcast/ieee-softwares-on-computing. From IEEE Software's March/April 2016 issue: http://www.computer.org/csdl/mags/so/2016/02/index.html. Visit IEEE Software: http://www.computer.org/software.