OS/2 doesn't come with loads of new options for the SET command, as Windows NT does.
Both OS/2 (CMD) prompts and OS/2 DOS (COMMAND) prompts generally follow the afore mentioned basic syntax.
There is one extra feature, though, available in OS/2 DOS promps only:
SET /S will display the amount of free environment space left
for that particular DOS session.
The /S option isn't available in OS/2 (CMD) sessions, since it isn't necessary. Environment space is dynamically allocated in OS/2 sessions.