DOS is not used at any time in any modern operating system.
dos operating system
dos(disk operating system) it is used to run older programs and junk
MS-DOS stands for Microsoft Disk Operating System. MS-DOS was an operating system for personal computers that was used during the 1980s through the mid-1990s.
DOS stands for Disk Operating System. To be useful computers have to have an operating system. The early IBM PC computers used the MS-DOS operating system. A DOS command is an instruction to the DOS operating system. It must be in a specific form. For example, the command DIR told the DOS operating system to list all files. These commands were typed at a place called the DOS command line. There a many such commands.
MS Dos is the operating system used for floppy disk and CDs. MS Dos is an old program created by Microsoft.
DOS stands for Disk Operating System.DOS was the operating system used by IBM on the first Personal Computer (PC) - hence PC-DOS.
DOS
UNIX.. Two more OS from MicroSoft - Xenix and MSX-DOS..
There are no widely used versions of DOS. It hasn't been used as an operating system since Windows 95 came out. If I recall correctly, the last version of DOS was 7.5 back in the early 1990s.
DOS and PC DOS are different. When we say DOS, it means Microsoft DOS or MS DOS whereas PC DOS is the different operating system (older than MS-DOS) developed by IBM. The term "DOS" is the acronym for Disk Operating System. This is the main control software that makes the computer start up and commence other loading functions. As stated PCDOS is in fact the same, an operation system and can refer to may of the older languages used when comouters were first developed such as Amiga DOS, Fast DOS etc.
MS-DOS was the first widely used operating system
Unix DOS