DOS

MS DOS Microsoft D isk O perating S ystem introduced by Microsoft Corporation in 1981. It became the operating system standard for PCs around the world and still serves as the foundation of the popular Microsoft Windows extended operating system. The ability to operate from DOS on low-capacity PCs having only 640K of random access memory (RAM) has become the limitation in modern times for DOS to remain a standard for higher speed and higher RAM computers. DOS has not been upgraded for newer 32-bit processors and will eventually fade as the newer 32-bit, 64-bit, and higher capacity PCs spread across world markets. (See also Operating system , Windows , Windows Chicago , Windows 2000 , and OS/2 )