They are used by specialty steelmakers to produce almost all the stainless steels, electrical steels, tool steels, and special alloys required by the chemical, automotive, aircraft, machine-tool, transportation, and food-processing industries.
But for much of the world, they are essential tools of transportation, used to get people to and from work, to get medical help out to the needy, and even to serve as farm machinery.
Workers told of employers who ignored the minimum wage, denied overtime, took illegal deductions to pay for tools or transportation, or forced them to work unpaid before or after their shifts.
The workers — many undocumented immigrants — told of employers who ignored the minimum wage, denied overtime, illegally docked their pay for the cost of tools or transportation, or forced them to work without pay before or after their shifts.
It's often been said that the invention of the car was the 'saviour of the horse' - as the engine became more widely used, horses became beloved and well looked-after animals used for leisure, rather than just tools for transportation and industry.
In that period, advanced research tools and transportation such as aerial photographs and vehicles were not available.
Traffic assignment models based on the user-equilibrium approach are one of the most widely used tools in transportation planning analysis.
Bilevel optimization models, and more generally MPEC (mathematical program with equilibrium constraints) models, constitute important modelling tools in transportation science and network games, as they place the classic "what-if" analysis in a proper mathematical framework.
And think about the sources of energy we started using during the Industrial Revolution, some 225 years ago -- I'm talking about the oil, natural gas, and coal that powered buildings, machine tools, and transportation.
