| Answer | Crossword Clue |
|---|---|
| ATTN | Abbr. for routing of mail |
| ATTN | Mail-routing abbr. |
| POB | Container for mail: Abbr. |
| DLO | Place for undeliverable mail: Abbr. |
| DLO | Dept. for unclaimed mail: Abbr. |
| DLO | Place for unclaimed mail: Abbr. |
| DLO | Place for undelivered mail: abbr. |
| DLOS | Places for undeliverable mail: abbr. |
| APO | Place for a GI's mail (abbr.) |
