is called parallel processing
No, parallel processing is something quite different.
But the question related to Arduino - not some device that might stretch our personal (or national) budgets.Basic question still stands - what do you mean by simultaneous"exactly so or just about so"jack
What about quantum computing? Can't they do an infinite number of operations at the same time?
Really? I swear I saw a special somewhere saying the quantum mechanics stated that any individual atom has an infinite number of states in which it exists at the same time.
An individual atom can exist in multiple states
But when you measure what state it is in the other states collapse and you end up with just one state. Therefore there is no way to extract information about the state. It's called Heisenberg uncertainty principle.