| Operating system | Developer | First release |
|---|---|---|
| Hiren's BootCD | — | — |
| Miraculix | — | — |
| RISC OS | Acorn Computers, RISCOS Ltd, RISC OS Open, Castle Technology | — |
| Twister OS | — | — |
| Windows Preinstallation Environment | Microsoft | — |
| Operating system | Developer | First release |
|---|---|---|
| Hiren's BootCD | — | — |
| Miraculix | — | — |
| RISC OS | Acorn Computers, RISCOS Ltd, RISC OS Open, Castle Technology | — |
| Twister OS | — | — |
| Windows Preinstallation Environment | Microsoft | — |