Limited Function Of The First Computers

The history of the modern computer begins with two separate technologies, automatic calculation and programmability, but not the only device capable of detecting the first computers, in part due to inconsistent application of the term. A few devices are worthy of note, though, as some mechanical support calculations, which were very successful, and has survived for centuries before the advent of the electronic computer, such as the Sumerian abacus, designed around 2500 BC descending . Which has won the speed race, modern desktop calculator 1946.the slide in Japan, was invented in 1620, which was carried on five Apollo space missions, like the moon and, probably, astrolabes and the Antikythera Mechanism, ancient astronomical computer built by the Greeks around 80 BC. Mathematical greek hero of Alexandria. 

(c.10-70 AD) built a mechanical theater which performed a play for 10 minutes and was driven by a complex system of ropes and drums that can be seen as a way to decide which parts of the mechanism performed which when.This actions and is the essence of programming.