UNIX LOGIN

[Bhargis at mrsa1]

I,ve logged in to some unix bulliten boards,, and immidiately got into menu
driven procedures, asking your name, where you are calling from etc..
eventually asking you to assign your own userid (for first time users), does 
anyone know how that is accomplished,, sure would appriciate the info...
I,ve been tasked to develop such a bulliten board, and would sure love to
know how the unix login was bypassed,,,,,,,anyone with that knowledge???

address    bhargis.mrsa1 at redstone-emh2

                                 Thanks