Types of operating systems

 Types of operating systems 

It is important to note that the operating system does not exist in a single standard. This means that there are several patterns available on the market, the ones found are: 

• MS-DOS operating system 
• Windows operating system 
• UNIX operating system 
• Linux operating system 
• Android operating system
• Apple operating system 
• Endless OS operating system 
• Introduction to the MS-DOS 

Operating System DOS 

Is a single-user, single-task operating system, with basic non-reentrant kernel functions: they can only be used by one program at a time. DOS stands for Disk Operating System or Disk Operating System. Main Features of MS-DOS Command prompt It is a command line interpreter on the operating system and on Windows NT based systems. It is a command analogous to command.com for MS-DOS and Windows 9x systems or shells used by Unix systems.

 Command prompt Examples: dir, md, cd, rd: individual tasks And the one that presents the monotask was designed to run on primitive computers without much RAM resources, the user runs a program it consumes system resources until it is closed, then another program can have access to memory. file names A distinguishing feature of MS-DOS is its file naming system. 

File names are limited to eight characters with a three-letter suffix indicating the file type as examples: TXT and DOC indicate text files and COM and EXE represent executables and SYS and the extension reserved for system files. drive letters MS-DOS's highlighting feature is its use of letters to refer to drives. Usually. A and B refer to floppy drives, while C and the following letters of the alphabet refer to hard drives.

Windows Operating System 

Windows is an operating system from microsoft which is responsible for the operation and management of a computer. 

Windows features Windows has some characteristics that we must take into account for the contest, as it is almost certain that this subject will be touched on: Windows is Graphic: It means that it is based on images, and not on texts, the commands are not given by the keyboard, memorizing keywords and command languages, as was done in the DOS era, we use the mouse to “click” ” in the places we want.

UNIX Operating System 

Unix is ​​a portable, multitasking, multiuser operating system originally created by Ken Thompson, Dennis Ritchie, and others who worked at AT and T Bell Labs. There are closed source versions and other open source projects. The UNIX brand is owned by The Open Group, a company formed by Computer companies, has an architecture of 86x, 64, ARM and PowerPC.

Linux Operating System

Linux is a term popularly used to refer to operating systems (European Portuguese) or operating systems (Brazilian Portuguese) that use the Linux Kernel.

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