| Operating system | Developer | First release | License |
|---|---|---|---|
| Gentoo Linux | — | — | GNU General Public License |
| Inspur K-UX | Inspur | — | — |
| Microsoft Windows | Microsoft | 1985 | proprietary license |
| NonStop OS | Tandem Computers | — | — |
| Windows XP 64-Bit Edition | Microsoft | — | — |
| Operating system | Developer | First release | License |
|---|---|---|---|
| Gentoo Linux | — | — | GNU General Public License |
| Inspur K-UX | Inspur | — | — |
| Microsoft Windows | Microsoft | 1985 | proprietary license |
| NonStop OS | Tandem Computers | — | — |
| Windows XP 64-Bit Edition | Microsoft | — | — |