Acces without password

Hi, I'm Maurizio Web designer from Italy.

Its possible to enter on joomla with only USERNAME field?
Its possible the acces without PASSWORD field?

if this is not possible.... how import the Password field of a Long listo of User?

You can help me? please?

thanks

I guess if you wrote a custom authentication plugin for Joomla it'd be possible, but out of the box no that's not possible.

Thanks for answer....

bye