| ID | Name | Type |
|---|---|---|
| #1392 | Aurelio Rodriguez | + |
| #1393 | Aurora Software | Z |
| #1394 | Aurun | ? |
| #1395 | Auryn Creative Group | Z |
| #1396 | Auryn Software | Z |
| #1397 | Authenticity | ? |
| #1398 | Automata UK Ltd | P |
| #17055 | Autoram | I |
| #1399 | Avalon | ? |
| #1400 | Avalon Computing | S |
| #22532 | Avalon Hill Game Company | P |
| #1401 | Avalon Software Ltd | M |
| #1402 | Avatar | ? |
| #1403 | Aventuras AD S.A. | Z |
| #1404 | Aventuras AM | Z |
| #1405 | Aventuras Espanolas | ? |
| #1406 | Aventuras Level 10 | ? |
| #1407 | Aventuras Mitologicas S.A. | Z |
| #22608 | Avi Margalit | + |
| #1408 | Aviation Computer Services | Z |