1840
you use iron for ironing your clothes,
Iron Was discovered by David (P.B.A.H).Yes he was a messenger and so .was a blacksmith.. and the first person in the world who would use iron so he is the 1st inventor.no it was Ben FranklinInvented(1928) by Philip Drinker
A miller grinds wheat into flour.
In any feed back control system, the controlling device has some parameters to be set (by the operator or person) before it is put to use, so that the system works under stable conditions. Also if the behaviour of the media (which is to be controlled) changes drastically the system may not work stable, which then needs a person's intervention.
Tech Person
a slave
Employee
someone who works for a business
An employee.
keelman
moofer
A mathematician
Landscaper
Freelancers
An astronomer.
An electrician.