| Answer | Crossword Clue |
|---|---|
| QED | Sign-off on a geometric problem. |
| ERAT | Part of a geometric sign-off |
| ASEVER | Sign-off on a letter. |
| QED | Geometric sign-off |
| ONESHOE | John's problem, off and on |
| APPROVE | Sign off on |
| OKAY | Sign off on |
| HALLOW | Sign off on |
| INITIAL | Sign off on |
| AGREETO | Sign off on |
| ALLOW | Sign off on |
| INIT | Sign off on: Abbr. |
| KTHXBYE | Dismissive on-line sign-off |
| TTYL | On-line sign-off (abbr.) |
| UNTIL | "... then ..." (on-air sign-off) |
