| Answer | Crossword Clue |
|---|---|
| ZIP | Five-digit code, for short |
| ZIP | Five-digit postal code, informally |
| ZIP | Five- or nine- digit code |
| HEX | 16-digit numbering system, for short |
| PIN | Access code, for short |
| RNA | Code carrier, for short |
| ICU | Code blue location, for short |
| ISBN | Code on the inside of a book cover, for short |
