IRIX 6.2. That is old. IRIX 6.5 is coming out. POSIX pthreads I beleive are fully bundled ever since IRIX6.4. -- Windows95 (noun): 32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit company, that can't stand 1 bit of competition.