Editing Thread (computing) (section)

====1:1 (kernel-level threading)====
Threads created by the user in a 1:1 correspondence with schedulable entities in the kernel<ref name="OSConcepts">{{Cite book |first1=Abraham |last1=Silberschatz |author-link1=Abraham Silberschatz |first2=Peter Baer |last2=Galvin |first3=Greg |last3=Gagne |title=Operating system concepts |publisher=Wiley |year=2013 |isbn=9781118063330 |edition=9th |location=Hoboken, N.J. |pages=170–171}}</ref> are the simplest possible threading implementation. [[OS/2]] and [[Win32]] used this approach from the start, while on [[Linux]] the [[GNU C Library]] implements this approach (via the [[Native POSIX Thread Library|NPTL]] or older [[LinuxThreads]]). This approach is also used by [[Solaris (operating system)|Solaris]], [[NetBSD]], [[FreeBSD]], [[macOS]], and [[iOS]].