How many systems do computers have?

There are 7 mainstream computer systems, namely: pure DOS system (such as C-DOS, M-DOS), Windows series operating system, LINUX system (such as CentOS, Ubuntu), UNIX operating system, Mac OS Operating systems, embedded systems, Google Chrome OS.

There are several types of computer systems:

1. Pure DOS system :

Including C-DOS, M-DOS, S-DOS, MS-DOS, etc.

2. Windows system

includes Win10, WIN7, WIN8, XP, WIN95, WIN98, WIN2000, etc.

Features:

⑴Intuitive and efficient object-oriented graphical user interface, easy to learn and use

⑵ The user interface is unified, friendly and beautiful

⑶Rich device-independent graphical operations

⑷Multi-task operating environment

3. LINUX system

Includes Red Hat, Red Flag, CentOS, Ubuntu, etc.

Features:

⑴Linux has two basic ideas: first, everything is a file; second, every software has a definite purpose

⑵Linux is a It is a free operating system that users can obtain for free through the Internet or other channels, and can modify its source code at will

⑶ Fully compatible with POSIX1.0 standard

⑷Multi-user, multi-task operating environment ;Support multiple platforms

4, UNIX operating system

Including AIX, HP-UX, Solaris, IRIX, Xenix, etc.

Features:

⑴UNIX system is a multi-user, multi-tasking time-sharing operating system

⑵UNIX system structure can be divided into three parts: operating system kernel, system call , Application

⑶UNIX system is mostly written in C language

⑷UNIX provides rich, carefully selected system calls

⑸UNIX provides powerful programmable The Shell language is used as the user interface

⑹UNIX system uses a tree directory structure

⑺UNIX system uses the memory management mechanism of process swapping and the storage method of request paging

⑻UNIX system Provides a variety of communication mechanisms

5. Mac OS operating system

Features:

⑴Full-screen mode is the most important function in the new version of the operating system. All applications can run in full-screen mode

⑵Task Control integrates the Dock and Control Panel, and can view various applications in window and full-screen modes

⑶The quick launch panel works in the same way The iPad is exactly the same⑻It displays all the applications installed on the computer with a user interface similar to the iPad and manages them through the App Store. The user can slide the mouse to switch between multiple application icon interfaces

⑷Mac App Store The working method is exactly the same as the App Store of iOS system. They have the same navigation bar and management method

6. Embedded system

Embedded system consists of hardware and software composition. It is a device that can operate independently. Its software content only includes the software running environment and its operating system. Hardware content includes signal processors, memories, communication modules, etc. Compared with general computer processing systems, embedded systems have great differences. They cannot realize large-capacity storage functions because there are no matching large-capacity media. Most of the storage media used are E- PROM, EEPROM DENG, etc. The software part uses API programming interface as the core of the development platform.

7. Google Chrome OS

Chrome OS is a PC-based operating system developed by Google. Google Chrome OS is an open source operating system based on Linux. Google stated on its official blog that initially, this operating system will be targeted at netbooks, compact and low-cost computers. This open source software will be named Chrome OS. Google will hold a Chrome-related product launch conference in the United States on December 7, 2010 (2:30 on December 8, Beijing time). At the conference, the Chrome Web store and Chrome OS.

The kernel is the most basic component of the operating system, and its structure usually affects the external characteristics of the operating system and applications to a certain extent.

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