C. 2500 BCE: Sumerian abacus -- c. 700 BC: Scytale -- c. 150: Antikythera mechanism -- c. 60: Programmable robot -- c. 850: "On Deciphering Cryptographic Messages ...
The Frontier Supercomputer at Oak Ridge National Laboratory - Oak Ridge National Laboratory/Wikimedia Commons There's no one answer to how many types of supercomputers there are. You can split ...