LINK:
Excellent Online Reference and Documentations
http://www.netbsd.org/Documentation/misc/index.html
- Online NetBSD Documentation:
http://www.princeton.edu/~unix/Solaris/sundocs.html
- Online Sun Documentation
http://publibn.boulder.ibm.com/cgi-bin/ds_rslt\#1
- Online AIX Documentation
Great Link and support refrence documentations for NetBSD, AIX and Solaris multi support. Featuring from Installation, configurations and Troubleshoot. A must see.