| Type | concern |
|---|---|
| Country | United States |
| Headquarters | Bedminster |
| Founded | 1885 |
| Industry | telecommunications industry |
| Website | att.com |
| Parent organization | AT&T |
| Dissolved | 2024 |
Sources: Wikidata (CC0) · Wikidata Q2843047
Systems · 2
| Operating system | First release | License |
|---|---|---|
| UNIX System III | — | — |
| Xenix | — | proprietary license |