| recordings |
|---|
| Jupiter 4c (early version of “Sky”) | | The Human League | 5:56 |
| Sky | | The Human League | 4:55 |
| Sky (Fusty Delights remix) | | The Human League | 6:59 |
| Sky (Martin Brodin remix) | | The Human League | 6:20 |
| Sky (Plastic Plates remix) | | The Human League | 5:32 |
| Sky (radio edit) | | The Human League | 3:10 |
| Sky (The Hacker remix) | | The Human League | 7:45 |
| Sky (The Hacker remix) | | The Human League | 2:28 |
