difference between libpthread.a libpthread_nonshared.a

[Kamaraju S Kusumanchi <kamaraju@bluebottle.com>]

On Debian unstable, I have

$ls -al libpthread*
-rw-r--r-- 1 root root 1076380 2007-11-26 17:55 libpthread.a
-rw-r--r-- 1 root root    3380 2007-11-26 17:55 libpthread_nonshared.a
-rw-r--r-- 1 root root     216 2007-11-26 17:55 libpthread.so

I always thought .a = static version of the library, .so = shared object or
dynamic library. Is that correct? If so, what is the difference between
libpthread.a and libpthread_nonshared.a?

thanks
raju
-- 
Kamaraju S Kusumanchi
http://www.people.cornell.edu/pages/kk288/
http://malayamaarutham.blogspot.com/