ADT
3 letters
Historical clue formulations
- Big letters in home security — 2026-09-21
- Home security inits. since 1874 — 2026-03-06
- Big letters in home security — 2024-02-28
- Big inits. in home security — 2022-12-04
- Big letters in home security — 2021-11-14
- Big inits. in security — 2021-08-28
- Big inits. in home security — 2021-06-19
- Big name in home security systems — 2017-10-13
- Big letters in home security — 2017-08-01
