| 99 (Ninety-Nine) | 3:27 |
| Hydra | 4:58 |
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 06SP 468, 06SP-468 | Toto | 99 (7", Single) | CBS/Sony, CBS/Sony | 06SP 468, 06SP-468 | Japan | 1979 |
| CBS S 8132, 8132 | Toto | 99 (7", Single) | CBS, CBS | CBS S 8132, 8132 | Germany | 1979 |
| BA 222622 | Toto | 99 (7", Single) | CBS | BA 222622 | New Zealand | 1979 |
| 1-11173 | Toto | 99 (7", Single) | Columbia | 1-11173 | US | 1979 |
| 1-11173 | Toto | 99 (7", Single) | Columbia | 1-11173 | Canada | 1979 |
| 12260 | Toto | 99 (7", Single) | CBS | 12260 | Costa Rica | 1979 |
| 1-11173 | Toto | 99 (7", Single) | Columbia | 1-11173 | Canada | 1979 |
| CSR 1097 | Toto | 99 (7", Single) | CBS Columbia | CSR 1097 | Peru | 1979 |
| BA 222622 | Toto | 99 (7", Single, Promo) | CBS | BA 222622 | Australia | 1979 |
| 1-11173 | Toto | 99 (7", Single, Promo) | Columbia | 1-11173 | US | 1979 |
| PD-166516 | Toto | Hydra (10", Shape, Single, Pic) | Columbia | PD-166516 | US | 1979 |
| CBS 8132 | Toto | 99 / Hydra (7", Single) | CBS | CBS 8132 | Italy | 1980 |
| SSC 5028 | Toto | 99 (7", Single) | CBS | SSC 5028 | South Africa | 1980 |
| 13-33402 | Toto | 99 (7", Single) | Columbia | 13-33402 | Canada | 1980 |
| CBS 8132 | Toto | 99 (7", Single) | CBS | CBS 8132 | Netherlands | 1980 |
| S CBS 8132 | Toto | 99 (7", Single) | CBS | S CBS 8132 | UK | 1980 |
| BA 222622 | Toto | 99 (7", Single) | CBS | BA 222622 | Australia | 1980 |
| CBS 8132 | Toto | 99 (7", Single) | CBS | CBS 8132 | Spain | 1980 |
| CBS S 8132, 8132 | Toto | 99 (7", Single, Promo) | CBS, CBS | CBS S 8132, 8132 | Germany | 1980 |
| S CBS 8132 | Toto | 99 (7", Single, Promo) | CBS | S CBS 8132 | UK | 1980 |