And what's special about that? Historically a
"computer" is a person who
does computations (what else?), this job description may well originate
from the 19th century.
Yes, it does. I believe it was in use in Babbage's time.
France did a really big project to compute sets of tables,
and they had a big workforce of computers to draw on.
It seems that a lot of hairdressers were idle because the
powdered wigs had fallen out of favor.
BLS