PC-DOS is an operating system developed by IBM for its personal computers. It is a version of MS-DOS, created by Microsoft, and was designed to manage hardware and software resources on early PCs. PC-DOS provided a command-line interface, allowing users to execute commands and run programs. Introduced in 1981, PC-DOS played a crucial role in the growth of personal computing. It supported various applications and was widely used in business and home environments. Over time, graphical user interfaces like Windows became more popular, leading to a decline in the use of PC-DOS.