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This article mainly explains "what is the volume, storage capacity, input and output capacity of the computer". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what is the computer's volume, storage capacity, input and output capacity?"

The volume, storage capacity, input and output capacity of the computer belong to "the scale and processing power of the computer". According to the performance, scale and processing power of computers, computers can be divided into supercomputers, large general-purpose computers, microcomputers, workstations, servers and so on.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

Computer (computer), commonly known as computer, is a modern electronic computing machine for high-speed computing, which can not only carry out numerical calculation, but also logical calculation, but also has the function of storage and memory. It is a modern intelligent electronic device that can run according to the program and process large amounts of data automatically and at high speed.

The volume, storage capacity, input and output capacity of the computer belong to "the scale and processing power of the computer".

Classification of computers

(1) according to the type of data processed by computer, it can be divided into analog computer, digital computer, digital computer and analog computer.

(2) according to the use of computer, it can be divided into general computer and special computer.

(3) according to the performance, scale and processing capacity of computers, computers can be divided into supercomputers, general-purpose computers, microcomputers, workstations, servers and so on.

There are five categories: supercomputers, large and medium computers, minicomputers, microcomputers, workstations and servers

Supercomputer: a super-large electronic computer with strong ability to calculate and process data, characterized by high speed and large capacity, equipped with a variety of external and peripheral devices and rich, high-function software systems.

Minicomputer: a high-performance 64-bit computer that uses a reduced instruction set processor with performance and price between a PC server and a mainframe.

Microcomputer: a small electronic computer consisting of large-scale integrated circuits. It is a bare metal based on microprocessor, equipped with internal memory, input and output interface circuit and corresponding auxiliary circuit.

Workstation and server: workstation is a kind of high-end general-purpose microcomputer with strong performance in graphics processing and task parallelism. Usually equipped with high-resolution large screen, multi-screen display and large capacity of internal and external memory, and has extremely strong information and high-performance graphics, image processing function of the computer; server, also known as server, is to provide computing services equipment, can be divided into file server, database server, application server, WEB server and so on.

The composition of a microcomputer

1. Central processing unit

Composition: arithmetic unit, controller, several registers and cache.

Performance index: directly determines the performance, word length and clock frequency of the whole machine.

2. Memory

Classification: main memory and auxiliary memory

(1) main memory (placed inside the host computer, used to store currently running programs and data. )

1) Internal memory

A, random access memory (RAM)

RAM is the main storage area of PC; it allows you to read and write data

It is a volatile memory.

B, read-only memory (ROM)

It contains programs and data that can be accessed and read but cannot be modified

It is a nonvolatile memory.

2) caching (Cache)

Used to temporarily store frequently used information to speed up access

Cache within the first-level Cache:CPU

Cache outside the second-level Cache:CPU

Level 3 Cache: used by the motherboard

(2) Auxiliary memory (external memory)

1) hard disk

2) Mobile storage products

USB removable hard disk

USB flash drive

Optical disk

A, CD-ROM CD-ROM

B. Write to the CD CD-R at one time

C, erasable CD-ROM CD-RW

D, DVD CD

3. Bus

ISA bus

PCI bus

AGP bus

EISA bus

4. Input equipment

Mouse, keyboard, etc.

5. Output equipment

Display device

(1) Classification: cathode ray tube display (CRT) and liquid crystal display (LCD)

(2) performance:

Pixel to point distance

Resolution: number of pixels on the entire screen = columns * rows

Display memory (video memory for short)

Display size: measured by the diagonal of the display screen

Printer

(1) Classification

Dot matrix printer

Ink jet printer

Laser printer

6. the main technical indicators of microcomputers

(1) word length: the number of bits that CPU can process binary data at the same time.

(2) clock frequency: refers to the clock frequency of CPU, in GHz.

(3) Operation speed: refers to the number of addition instructions that can be executed per second, often expressed as MIPS.

(4) Storage capacity: mainly refers to the storage capacity of memory.

(5) access cycle: the time it takes for CPU to access data from internal memory.

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