This is a question I ask myself everytime I start a new project that requires authentication.  And then respectively is it Sign Out, Sign Off, Log Out, or Log Off?

What is this all about?  Well I was trying to determine if there was a standard terminalogy used to describe entering your username and password to gain access to a system or application.

I found no definitive answer, but I did check out a few random web sites and operating systems to see what they used.

Most of the web sites I checked, mac, solaris, redhat w/gnome use Log In/LogOut.

Only Windows OS’s and a couple we sites used Log On/Log off.

And then Sign In/Sign Out was rather limited.

Now granted, my selection of web sites is farely limited and I did not check any actual client applications.

There is a term called Single Sign On, yet I did not run across any systems which actually term their username and password screen Sign On.