In fact, ddg is not an "abbreviation" or "abbreviation", but may be a mixed name of code name and abbreviation. Here dd should refer to destroyer and g should refer to guided missile. Taken together, the ddg is a guided missile destroyer. Missile cruiser. However, in addition to the Korean style, the US military currently envisions the ddg(x) with some features of the t26 - a destroyer payload module to provide additional payload capability. If I remember correctly, the Australian Hunter-class frigate is equipped with a similar design.
