Threads? in UNIX?

[Brad Sherman]

G.Michael Vose, in an article "Threading the OS/2 Needle," in
"Computer Language," July, 1988, p.34,  writes:

"... Threads used as the underlying concept for multitasking are
beginning to have a major impact on operating system design.  Not only
are they the basis for OS/2, but the rewrite of UNIX currently underway
as a joint Sun/AT&T project also incorporates the use of threads to 
make that version of UNIX more competitive with OS/2. ... "

Can anyone confirm or expand?

	--Brad Sherman