I entered US as an F-1 student, but Im not sure what the DS part stands for. Thanks.
D/S means duration of status. Keep in touch with your DSO (Designated School Official) to keep your status valid. Maintain enough coursework, dont work without checking with DSO. If you will travel abroad, check with DSO first about your I-20. You can fall out of status by certain actions, dont screw up and study hard. Flunking out destroys status, too.
"Duration of Status" - it means that the I-94 stays valid as long as you are a student.
What is "F1 DS" on I-94 mean?