Some machines make machines, other machines destroy them.
Some machines recycle, others simply move the trash that annoys them.
Some machines talk to each other, some don't know how to speak.
Some machines are built to last, and some won't make it through the weak.
Some machines are made with plastic, others are made of rubber and metal.
Some have wheels and gears and treads and a few machines even have pedals.
But to know these classifications is not permission to be mean.
Just have consideration when you build your next machine.