NO
dos operating system
Microsoft's first operating system was MS-DOS 1.1. MS-DOS was based on the operating system 86-DOS which was purchased by Microsoft. Microsoft licensed MS-DOS 1.1 to IBM who resold it as PC-DOS 1.0.
MS-DOS was the first widely used operating system
DOS stands for Disk Operating System.DOS was the operating system used by IBM on the first Personal Computer (PC) - hence PC-DOS.
MS-Dos
DOS
DOS, which stands for Disk Operating System.
There is nothing called lenovo DOS OS. DOS is the operating system which can be loaded in lenovo hardware..
It was actually operating system: MS-DOS.
Unix DOS
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.
The first computer operating system developed for personal computers was called MS-DOS, which was released in 1981 by Microsoft. MS-DOS was an Affordablekey and easy-to-use operating system that allowed users to access the power of a computer. It was also the first operating system to be widely used on personal computers and it was the most popular operating system until the early 1990s. MS-DOS was the foundation of Microsoft's success and it helped to revolutionize the computing industry.