I have no damn clue. I did a quick Google of "DO189B/C" (and related..typos are definitely possible here) and nothing jumped out.

I typed this up 3.5 years ago, and didn't give a crap about Facebook one way or another at that time, so whatever was said there didn't stick with me at all.

Hopefully somebody else where can somewhat decode mystery string (that might have typos) based on context.