Comic code???

[Arie Fachrisal]

Hi,
thanks Stephan about the codes. Now i know about DD, DDA, US means but i
just checking out my collection and found this code: DDOS 1150 (it's Barks
story about Daisy's Diary). Can't figure out the DDOS meaning. Help???;-)
BTW, about the numbers??? Recent published works have this numbers after the
codes. But is there any meaning to it? Or are the numbers just some kind of
"serial numbers" to ease up archiving the stories to Disney database?
He-lp???;-) PS some numbers are about the mag's number when the story is
first published but what about for example: H 8935

Thanks,
Arie Fachrisal:-)