well, it happened between 1894 and 1935, as the bell artifacts collection tells. the "millionaire" was invented by a swiss, otto steiger. | some say he is from munich, some say he is swiss and lived in munich, no sé)

also in the collection: sharp's elsi mate el8048

there is a student site telling the history of russian stchoty, aka abacus. | praised by ieee, the never-dare-to-remember-my-url.org.

addiator, correntator, exactus and maximator are names for so called blechschieber