/9pm/src/9/ - Plan 9 from User Space

Plan 9 from User Space's /usr/local/plan9/9pm/src/9/

drwxr-xr-x  2 rsc  users   512 Feb 21  2005 Windows/
drwxr-xr-x  2 rsc  users  1024 Feb 21  2005 port/
-rw-r--r--  1 rsc  users   345 Feb 21  2005 portsyscall.h