In Unix it is rather "everything has a file descriptor at API level" while in Plan9 it is really "everything is a file" from the system standpoint. It is not s

In Unix it is rather "everything has a file descriptor at API level" while in Plan9 it is really "everything is a file" from the system standpoint. It is not surprising since Plan9 also came from Bell Labs, and they learned the lessons of Unix, raising the idea to a new level.