| Answer | Crossword Clue |
|---|---|
| INRE | Business-letter notation |
| ENC | Business letter notation: Abbr. |
| ENC | Letter notation |
| ATTN | Letter-routing notation |
| PPS | Second notation at the bottom of a letter |
| symbols | A mark or character used as a conventional representation of an object, function, or process, e.g., the letter or letters standing for a chemical element or a character in musical notation |
