The thing I loved about AIX is SMIT (System Managment Interface Tool). Available both from the command line and GUI, you could completely manage the AIX system

The thing I loved about AIX is SMIT (System Managment Interface Tool). Available both from the command line and GUI, you could completely manage the AIX system from it, but at any point, you could also have it print out what commands it was going to run (yes, it built a shell script as you navigated through the system). I've never seen a system like it anywhere else.