Number Crunching: Earlier, calculating the payroll of a large company required millions of arithmetical calculations, but today, it can be done by a central computer because manipulating numbers—number crunching—is what a computer does in the best manner.
Data Processing: As a data processor, the computer demonstrates another strength. Professionals feed the information (data) into it in the form of figures. This is called data processing.
Binary System: Zeros and ones, in their endless combinations, constitute binary system on which computer operation is based. A scheme of numeration with the base ten requires ten symbols or ciphers (including zero), whereas an arithmetic with the base two requires only two ciphers: 0 and 1. Under the binary system, all ordinary arithmetical operations are reduced to their simplest form.