| Clue | Source | Date |
|---|---|---|
| Rotary dial successors | USA Today | 25 Aug 2022 |
| Sites of some alphanumeric keypads | Universal | 30 Apr 2021 |
| Products since the 1960s ... on which you can see five 'key' things depicted in this puzzle | New York Times | 01 Oct 2020 |
| Push-button communicators | Wall Street Journal | 29 Jun 2020 |