Austrian CD label since circa 2000, usually identifiable by: The logo (as depicted).
Typical catalogue number are: 1xx.xxx, CD 1xx.xxx (i.e 154.168 or CD 154.218) for release containing 1 disc/cassette.
2xx.xxx or CD 2xx.xxx for 2 discs boxset. 3xx.xxx or CD 3xx.xxx for 3 discs (or more discs) boxset.

Note: discs with ACD and 941xxx numbering are on the Germanofon label.
In such a case ACD is used as fake rights society. Do not credit ACD at all. Instead use Germanofon as label and mark as unofficial. See Germanofon profile for more detailed infos.