The computer usually used for calculations is

referred to as digital computer. The information transmitted, stored and calculated inside is all numbers expressed in the form of electromagnetic signals. A typical digital electronic computer consists of a central processing unit, a computer storage system, and a computer input/output system.                                                                                                                                     (Recommended learning: web front-end video tutorial)

The computer storage system includes main memory and auxiliary memory. The central processing unit and main memory are collectively called the central processing unit; the computer input/output devices and auxiliary memory are collectively called computer peripherals. A computer cannot work even if it only has hardware. It must also have a set of "programs" to determine the rules and order of information processing.

The same hardware paired with different programs can solve different types of problems. Computer programs and corresponding data and documents are collectively called computer software, which includes computer system software, computer application software and computer support software. The organic whole composed of computer hardware and software is called a computer system.

Digital electronic computers are the mainstream in the electronic computer industry in the world today. Their internal processing is an electrical signal called a symbolic signal or a digital signal.

Its main feature is "discrete". There cannot be a third symbol between two adjacent symbols. Due to this difference in signal processing, its composition and performance are superior to analog electronic computers.

Features

1. Fast operation speed

2. High operation accuracy

3. Strong versatility

4. With memory function and logical judgment function

5. With automatic control capability

Classification

Electronic computers include giant, large and medium-sized , small, micro and monolithic, etc. Computers often refer to the last two types.

Microcomputer is also called microcomputer or microcomputer. Supercomputer is mainly defined in terms of performance.

In the 1970s, computers with a computing speed of more than 10 million operations per second, a storage capacity of more than 10 million bits, and a price of more than 10 million U.S. dollars were internationally considered supercomputers; some people also regarded computers with a computing speed of more than 10 million times per second. An electronic computer that executes 10 million instructions per second and has a main memory capacity of several megabytes is used as a supercomputer.

In the 1980s, the standard for supercomputers was a digital electronic computer with a computing speed of more than 100 million times per second, a word length of 64 bits, and a main memory capacity of 4-16 megabytes. China's Galaxy Computer is a supercomputer.

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