| Answer | Crossword Clue |
|---|---|
| ALFA | First code word |
| ABLE | First code word |
| ALFA | First radio code word? |
| MORSE | Code first used in 1844. |
| HONORBLACKMAN | Actress whose first name is a code |
| NINE | First digit in a California zip code |
| NINE | First digit in an Alaskan zip code |
| NINE | First digit in a Hawaiian zip code |
| AMANA | First microwave with a bar-code reader |
| NINE | First digit in a California ZIP code |
| TWO | First and last digit in a Manhattan area code |
| TWO | First or last digit of D.C.'s area code |
