The essential differences between electronic computers and other computing tools are

1, the composition is different

Computer is composed of hardware system (hardwaresystem) and software system (softwaresystem) two parts. Calculators are generally composed of operators, controllers, memory, keyboards, monitors, power supplies and some optional peripherals and electronic accessories, through manual or machine equipment.

2, different functions

Calculator is only a simple calculation tool, the computer is equipped with complex storage functions, control functions, more powerful, that is, "computer".

3, the operation of different

Calculators and computers are able to achieve the same data entry, processing, storage and output, but it is so different from the computer is that it can not automatically realize these processes, must be operated by a person to complete. And the computer through the preparation of the program can be automatically processed.

4, different scalability

The calculator uses a solidified processing program, can only complete a specific computing task; and the computer with the operating system platform and various types of application hardware and software, can be unlimited expansion of its field of application.

Expanded information:

The main features of electronic computers

Fast arithmetic: the internal circuitry of the computer can be composed of a variety of high-speed and accurate completion of the arithmetic The main features of the electronic computer

Calculation of high precision: the development of science and technology, especially the development of cutting-edge science and technology, requires a high degree of precision calculation. The reason why computer-controlled missiles can accurately hit the intended target is inseparable from the computer's precise calculations. General computer can have a dozen or even dozens of (binary) effective digits, the calculation accuracy can be a few thousandths to a few millionths, is beyond the reach of any computing tool.

Baidu Encyclopedia - Electronic Computer