Multiple choice general knowledge science & technology IBM launched an Operting System to compete with Microsoft's MS-DOS. Name it CP-DOS PC-DOS IBM-DOS OC/2 Reveal answer Fill a bubble to check yourself B Correct answer Explanation PC-DOS was IBM's operating system developed to compete with MS-DOS. It was essentially an IBM-branded version of MS-DOS, licensed from Microsoft. CP-DOS and IBM-DOS are not correct. OS/2 was a later IBM-Microsoft joint project (not OC/2).