| A1 | TeethWritten-By – Mike Ratledge |
9:12 |
| A2 | Kings And QueensWritten-By – Hugh Hopper |
5:00 |
| A3 | Fletcher's BlemishWritten-By – Elton Dean |
4:34 |
| B1 | Virtually Part 1Written-By – Hugh Hopper |
5:17 |
| B2 | Virtually Part 2Written-By – Hugh Hopper |
7:06 |
| B3 | Virtually Part 3Written-By – Hugh Hopper |
4:31 |
| B4 | Virtually Part 4Written-By – Hugh Hopper |
3:20 |
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| S 64280 | Soft Machine | Fourth (LP, Album) | CBS | S 64280 | UK | 1971 |
| MHCP 424 | Soft Machine | Fourth (CD, Album, RE, Pap) | Sony Music Direct (Japan) Inc. | MHCP 424 | Japan | 2004 |
| S 64280 | Soft Machine | Fourth (LP, Album, RE) | CBS | S 64280 | UK | Unknown |
| MHCP 614 | Soft Machine | Fourth (CD, Album, RE, RM, Unofficial, DSD) | Sony Records Int'l | MHCP 614 | Russia | 2005 |
| MHCP 614 | Soft Machine | Fourth (CD, Album, RE, RM, DSD) | Sony Records Int'l | MHCP 614 | Japan | 2005 |