Computer system software is classified, and computer software is divided into system software and ap

Computer software refers to programs and their documentation in a computer system. A program is a description of the processing object and processing rules of a computing task; The documentation is intended to facilitate the clarification of the information required for the procedure. Programs must be loaded inside the machine to work, and documentation is generally for people to see, not necessarily into the machine.

Software is the interface between the user and the hardware. Users communicate with their computers primarily through software. Software is an important basis for the design of computer systems.

For the convenience of users, in order to make the computer system have a high overall utility, when designing the computer system, it is necessary to consider the combination of software and hardware, as well as the requirements of the user and the requirements of the software. The correct meaning of software should be:

1) Runtime, a collection of instructions or computer programs capable of providing the required functionality and performance. (2) The program is able to handle the data structure of the information satisfactorily.

3) Documentation that describes the functional requirements of the program and how the program operates and uses the requirements. Software has different characteristics from hardware: (1) Different forms of expression.

The hardware is tangible, colored, smelly, visible, touchable, and smelly. And software is invisible, colorless, odorless, invisible, intangible, and invisible. Most of the software exists in people's heads or on paper, and whether it is correct or not, whether it is good or bad, will not be known until the program is running on the machine.

This creates many difficulties in design, production and management. (2) Different production methods.

Software is development, which is the high exertion of human intelligence, not hardware manufacturing in the traditional sense. Although there are many commonalities between software development and hardware manufacturing, the two activities are fundamentally different. (3) The requirements are different.

Hardware products allow for errors, while software products do not. 4) Maintenance is different.

Hardware is to be used for the old, in theory, the software will not be used for the old, but in practice, the software will also become old and bad. Because throughout the lifetime of the software, it is in a state of change (maintenance). Software is divided into system software and application software System software such as:

Operating system. Application software such as: Word WPS RAR, etc.

It is divided into two categories: system software and application software.

System software: Intuitively speaking, it is the operating system and drivers, such as Windows XP 2003 ME, Vista and motherboard drivers, graphics card drivers, etc.

Application software: It is software that can be installed on the operating system to achieve personal work, study and games, and office QQ game software belongs to the category of application software.

According to the purpose of the software, computer software is generally divided into two categories: system software and application software.

1. System software. System software provides the most basic functions for computer use, which can be divided into operating system and system software, of which the operating system is the most basic software.

System software is responsible for managing the various independent pieces of hardware in a computer system so that they can work in harmony. System software enables computer users and other software to treat the computer as a whole, regardless of how each piece of underlying hardware works.

2. Application software. Application software is software that has been developed for a specific purpose. It can be a specific program, such as an image browser.

It can also be a collection of programs that are closely related to each other and can work together, such as Microsoft's office software. It can also be a large software system consisting of many independent programs, such as a database management system.

Classification of software licensing methods

1. Proprietary software: This type of authorization usually does not allow users to copy, study, modify or distribute the software at will. Violations of such authorizations are often subject to serious legal liability.

Traditional business software companies use this type of license, such as Microsoft's Windows and Office software. The source code of proprietary software is often treated as private property by companies and is closely protected.

2. Free Software: This type of license is the opposite of proprietary software, giving the user the right to copy, research, modify and distribute the software, and to provide the source code for the user to use freely, with only a few other restrictions. Linux, Firefox and OpenOffice are examples of such software.

3. Shareware: Usually you can obtain and use its trial version for free, but it is limited in function or use period. Developers encourage users to pay for a fully functional commercial version.

With the authorization of the shareware author, users can obtain copies of it free of charge from various sources and can also freely distribute it.

Computer software systems are usually divided into two categories: system software and application software. The software system of a computer refers to the various programs, data and related documents that the computer runs. Although they serve different purposes, they all have in common that they are all stored in computer memory and encode written programs or data in a certain format.

Computer system software can ensure the normal operation of the computer according to the user's wishes, in order to meet the various needs of the user to use the computer, only Gaohuai helps the user to manage the computer and maintain resources, perform user commands, control system scheduling and other tasks. Application software is directly oriented to the needs of users, they can directly help users improve the quality and efficiency of their work, and even help users solve certain problems.

Computer software is generally divided into two categories: system software and application software

System software is a variety of operating systems, such as Windows, Linux, Unix, etc., as well as operating system patches and hardware drivers, all of which are system software.