ATOK
| ATOK | |
|---|---|
| Developer(s) | JustSystems | 
| Initial release | 1983 | 
| Stable release | ATOK for Windows (Tech Ver.34)
   / February 1, 2024 | 
| Operating system | Microsoft Windows, macOS, iOS, and Android | 
| Type | Input method editor | 
| License | Trialware | 
| Website | www | 
ATOK (/ˈeɪtɔːk/; エイトック Japanese pronunciation: [eitokku]) is a Japanese input method editor (IME) produced by JustSystems, a Japanese software company.
ATOK is an IME with roots from KTIS (Kana-Kanji Transfer Input System) come with JS-WORD, the Japanese word processor software for PC-100 in 1983, but it now supports a variety of platforms including macOS, Windows, Android, and iOS.
Once ATOK meant Automatic Transfer Of Kana-kanji. Now, it means Advanced Technology Of Kana-kanji Transfer. It is occasionally taken to stand for Awa-TOKushima, site of the headquarters of JustSystems, or Alphabet TO Kanji.