| Operating system | Developer | First release | License |
|---|---|---|---|
| Cray Operating System | Cray | — | — |
| Cray Time Sharing System | Lawrence Livermore National Laboratory, Los Alamos National Laboratory | — | — |
| NLTSS | Lawrence Livermore National Laboratory | — | — |
| Operating system | Developer | First release | License |
|---|---|---|---|
| Cray Operating System | Cray | — | — |
| Cray Time Sharing System | Lawrence Livermore National Laboratory, Los Alamos National Laboratory | — | — |
| NLTSS | Lawrence Livermore National Laboratory | — | — |