Which of the following does not support more than one program at a time?

Which of the following does not support more than one program at a time?

مندرجہ ذیل میں سے کون ایک وقت میں ایک سے زیادہ پروگرام کو سپورٹ نہیں کرتا؟
Explanation
  • DOS (Disk Operating System) is a family of disk operating systems.
  • It primarily consists of MS-DOS and a rebranded version.
  • Only one program can run at a time using DOS.
  • DOS lacks functionality to execute more than one program simultaneously.