| Name | Country | City | Rating | |
|---|---|---|---|---|
| ASK Ltd. | 0.00 ±0.0 | |||
| ASP Software | 0.00 ±0.0 | |||
| Astrocalc | 0.00 ±0.0 | |||
| ATACOMP | 0.00 ±0.0 | |||
| Atarax | 0.00 ±0.0 | |||
| Atari Benelux | 0.00 ±0.0 | |||
| Atari Bit Byter User Club | Poland | 0.00 ±0.0 | ||
| Atari Center | 0.00 ±0.0 | |||
| Atari Classics | 0.00 ±0.0 | |||
| Atari Club Padova | 0.00 ±0.0 | |||
| Atari Computing | 0.00 ±0.0 | |||
 Atari Corp. | Atari Corp. | United States | Sunnyvale, California | 0.00 ±0.0 |
| Atari Deutschland | 0.00 ±0.0 | |||
| Atari Explorer | 0.00 ±0.0 | |||
| Atari France | 0.00 ±0.0 | |||
| Atari Info | 0.00 ±0.0 | |||
| Atari Italia | 0.00 ±0.0 | |||
| Atari Klub Praha | 0.00 ±0.0 | |||
| Atari Magazin | 0.00 ±0.0 | |||
| Atari Magazine | 0.00 ±0.0 |
