प्रसंस्करण गति और कम्प्यूटेशनल शक्ति के मामले में, निम्नलिखित में से कौन सा कंप्यूटर सबसे तेज़ होता है?

The ancient calculating device 'Abacus' was invented in which country?

Teleprocessing and time-sharing features were introduced extensively in which generation of computers?

The use of microprocessors as the core processing element started in which generation of computers?