> "NT is the only major OS I know of that has always had personality subsystems." In what way is a "subsystem" different than a "library" or a "process" or a "

> "NT is the only major OS I know of that has always had personality subsystems." In what way is a "subsystem" different than a "library" or a "process" or a "driver" (if it runs in kernel space)? Any process can use the native API. What's special about a "subsystem"?