Solaris 2.5
Solaris 2.5 (SunOS 5.5) is a version of Solaris released in November 1995. Support for the UltraSPARC processor was added. CDE, NFSv3 (Network File System version 3) and NFS/TCP were added. Support for the line of Sun-4 computers which are VMEbus-based were dropped. POSIX.1c-1995 pthreads was added. Doors was added but wasn't documented until Solaris 2.6. Support for this version ended in December 2003.