System software mainly includes four categories, namely: 1. Operating system, which is the lowest level software and is the bridge between the computer bare metal, applications and users; 2. Language processing program, the computer can only Directly recognize and execute machine language, so to run high-level language programs on a computer, a program language translation program must be equipped; 3. Database management, which is a large-scale software that manipulates and manages databases, and is used to establish, use and maintain databases; 4. Auxiliary programs mainly include editing programs, debugging programs, equipment and connection programs, and debugging programs.
#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
What are the four main types of system software?
1. Operating system
The operating system manages the computer's hardware devices so that application software can use these devices conveniently and efficiently. It is the lowest level software. It controls all programs running on the computer and manages the resources of the entire computer. It is the bridge between the bare metal of the computer, applications and users. Without it, users cannot use a certain software or program.
The control and management center of the computer system, from a resource perspective, has four functions: processor, memory management, device management, and file management.
2. Language processing program
Compiled software The CPU only completes a very simple operation for each instruction executed. A system software or application software requires thousands or even hundreds of millions of A combination of instructions. Writing software directly using basic instructions is an extremely arduous and difficult task.
Computers can only directly recognize and execute machine language. Therefore, if you want to run high-level language programs on your computer, you must be equipped with a program language translation program. The translation program itself is a set of programs, and different high-level languages have corresponding translation programs. .
3. Database management
The database management system stores large amounts of data in an organized and dynamic manner, allowing people to use these data conveniently and efficiently.
Database management system is a large-scale software that manipulates and manages databases and is used to establish, use and maintain databases.
4. Auxiliary programs
System auxiliary processing programs are also called "software development tools", "support software", and "software tools". They mainly include editing programs and debugging programs. , equipment and connection procedures, debugging procedures.
Related extensions:
The operating system is used to manage computer resources and control the running of programs. Language processing systems are software used to process software languages, such as compilers, etc. Database system is software used to support data management and access, including databases, database management systems, etc.
A database is a set of data that resides in a computer system. The relationship between them is defined by a data schema and described by a data definition language. The database management system allows users to use data as axis items. Software for accessing, using and modifying.
Distributed software systems include distributed operating systems, distributed programming systems, distributed file systems, distributed database systems, etc. The human-computer interaction system is a software system that provides information interaction between users and computer systems according to certain agreements, and can provide users with a friendly human-computer interface.
The functions of the operating system include processor management, storage management, file management, device management and job management. Its main research contents include the structure of the operating system, process (task) scheduling, synchronization mechanism, deadlock prevention, Memory allocation, device allocation, parallel mechanism, fault tolerance and recovery mechanism, etc.
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