Unknown operating system mature similar to Linux?

[trident]

...

[Combuster]

There are many stable and mature operating systems out there few people have heard of. Many of them are not in the desktop market.

You probably don't want to hear that wikipedia has the answer to this homework question, so what are you trying to achieve here?

[iansjack]

Exist unknown operating system that is mature and stable of manner similar or above when compared to Linux?

One thing that we do know is that there are no unknown operating systems.

[Muazzam]

Minix. Linus implemented Linux on a Minix machine; that's why, Linux had Minix file-system driver.

[Hellbender]

One thing that we do know is that there are no unknown operating systems.

Well, there are those who claim to have been kidnapped by unknown operating systems. Some probing involved, apparently.

[bluemoon]

There is no unknown OS that I know, except for those I don't.

[Muazzam]

There is no unknown OS that I know, except for those I don't.

I think, he meant, an OS that is not very well-known.

[iansjack]

There is no unknown OS that I know, except for those I don't.

Otherwise known as the Rumsfeld Algorithm (with a nod to Kurt Gödel).

[trident]

...

[iansjack]

Have you ever heard of a website called "Google"? It is very useful when researching this kind of question.

[onlyonemac]

Have you ever heard of a website called "Google"? It is very useful when researching this kind of question.

If the OS is not widely known, Google is unlikely to find it but we might happen to know about it. So it wasn't THAT unreasonable that he asked...