Here's the list (cut'n'pasted from somewhere else I can't find at the moment):
==== NetBackup Unix Client1 (Tru64(Alpha), HP's and AIX)
NetBackup_6.5_CLIENTS1.tar.gz
-Tru64, AIX and HP Risc/IA64
==== NetBackup Unix Client2 (Mac and Linux's)
NetBackup_6.5_CLIENTS2.tar.gz
-Mac
-all Supported Linux: Redhat & Suse; IA64/x86/X64;
also IBMz and PowerPC
==== NetBackup Unix Client3 (Solaris's, FreeBSD and IRIX)
NetBackup_6.5_CLIENTS3.tar.gz
-Solaris Sparc & X86, FreeBSD and SGI-Irix