Did you know where the name computer first came from?
In 1884, Dr. E. Felt, an American, took a big step forward by inventing a device called "Comptometer" This device had various buttons that could be used to perform mathematical calculations, and it is considered the first successful example of a calculator with keys

The definition of a computer was the same until the end of the 19th century, but when the industrial revolution took place, the purpose of computers became more computational than processing, so they were often referred to as mechanical machines or mechanical computers.