Here are two approaches:
echo $$
ps
getty is a program which issues the login to the computer , when you log in you give a name to getty and identify yourself to the computer
The name of your login shell is set when you log in - check the $SHELL environment variable. Note that this is a changeable environment variable so it isn't always accurate. You could also use the 'finger' command or 'grep' through the password file to see what your login shell environment will be set to. However, if you are in a subshell or child shell, you will need to check on the shell environment with the 'ps' command to see what the shell currently running might be.
The atomic number.
A number can help name and identify a monarch. Queen Elizabeth II for instance.
Login is when you type in your account name and password To get your account name and password you need to "Sign Up"
The login name is the name required to access content that may be protected. In order to have a login you have to register with a site.
It depends on what you are referring to. It may be either the login name to the game (which would be your characters name) or the login name for their website.
I believe you are referring to the shell program, which is that interface. There are many different shell environments available to the user, depending on what they intend to do in the login area. Some shells are more for software developers, some are for users, etc.
number
There should be a manufacturer's name and model number on it.
qwerty
You put your full name on the username and your clocking in password