| Groups (developers) | Abbr. | Country | City | Rating | |
|---|---|---|---|---|---|
| Tyne & Wear Atari Users Group | 0.00 ±0.0 | ||||
| Tynesoft | 0.00 ±0.0 | ||||
| Tyson Educational Systems, Inc. | 0.00 ±0.0 | ||||
| U.N.O. | 0.00 ±0.0 | ||||
| UKACOC | 0.00 ±0.0 | ||||
| UltraBASIC, Inc. | 0.00 ±0.0 | ||||
| Ultrasoft | 0.00 ±0.0 | ||||
| Underground Software | 0.00 ±0.0 | ||||
| Unicorn Software | 0.00 ±0.0 | ||||
| Union Software Of Silesia Rousers | Poland | Silesia (Śląsk) | 0.00 ±0.0 | ||
| United Crackers Of Germany | 0.00 ±0.0 | ||||
| United Software Art | 0.00 ±0.0 | ||||
| United Software Artists | 0.00 ±0.0 | ||||
| United Software of America | 0.00 ±0.0 | ||||
| United Software of Gdansk | Poland | Gdansk (Gdańsk) | 0.00 ±0.0 | ||
| University of Iowa | 0.00 ±0.0 | ||||
| Unlimited | 0.00 ±0.0 | ||||
| Urania Systems | 0.00 ±0.0 | ||||
| US Gold | 0.00 ±0.0 | ||||
| User-Mag | 0.00 ±0.0 |
