Since ancient times, people have been doing various jobs and, in order to make their work easier, they have invented tools and devices. In our time, there is a huge number of tools and machines, both complex in design and simple, that can be found for a worker of any profession; Music: Creative Commons Attribution 4.0 license for Amazing Plan - Distressed (performer: Kevin MacLeod): https://creativecommons.org/licenses/by/4.0/ Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100738 Artist: http://incompetech.com/