Conversation so far:
when was the first computer launched in world
There is no easy answer to this question due to the many different classifications of computers.
what is one classification of computer
The word computer was first used in 1613 in the book The Yong Mans Gleanings by Richard Braithwaite and originally described a human who performed calculations or computations.
when did the meaning of computer as a human who performs calculations change
The definition of a computer remained the same until the end of the 19th century, when the industrial revolution gave rise to machines whose primary purpose was calculating.

Question: what were these machines
Self-contained rewrite: what were the first machines whose primary purpose was calculating