Computer
Human resources is the term for people who work. It is a modern term. There is a useful kind and an unuseful kind. The good workers are the useful kind.
Yes, for the model T and the invention of the assembly line. Thats kind of a matter of opinion. But he did push factories to their modern efficiency.
1. the invention of computers 2. the invention of human kind 3. the invention of inventing!
An invention is a new, useful process, machine, improvement, etc., that did not exist previously and that is recognized as the product of some unique intuition or genius, as distinguished from ordinary mechanical skill or craftsmanship, and a discovery would be to be the first of one's kind to find, learn, or observe something. :)
The coin of lowest value was the quadrans, kind of like the modern American penny. The asse is worth more, kind of like the modern American dollar. Then came the denarius, kind of like the modern American 20 dollar bill.
Fire works
they didnt wear armor if you mean modern day times
giraffes useful to mankind ?
what kind of poem is a homonym useful in
Human teeth sharpening is seen, in modern times, as a kind of extreme body modification.
sky scraper
Sarah Boone inventor is good then everybody else.