MS-DOS turns 30 years oldAncient history for many readersBy Inquirer staffThu Jul 28 2011, 16:01BACK IN THE MISTS OF TIME when personal computers were first invented, there was a primitive command shell and program loader that most people used to make them work. It was called MS-DOS and it turned 30 years old this week.If you vaguely remember MS-DOS and its variants like PC-DOS and DR-DOS, or you're a bit curious, our sister IT news web site V3.co.uk has revived some memories and related the story for you.