Which is not a multitasking operating system?

کون سا ملٹی ٹاسکنگ آپریٹنگ سسٹم نہیں ہے؟

DOS

Windows

Linux

None of these

DOS (Disk Operating System) is a single-tasking operating system, meaning it can only run one program at a time.

Windows and Linux are multitasking operating systems, capable of running multiple programs simultaneously.