Alternatively referred to as a sign in , a login or logon is a set of credentials used to gain access to an area requiring proper authorization.
Logins grant access to and control of computers, networks, and bulletin boards , and online accounts, and other services or devices.
Today, most logins consist of both a username and password.
"Log on" and "log-on" are the same as their "log in" and "log-in" counterparts, but are not as commonly used today.
If the improper username or password is entered or you have forgotten them, you cannot access your account.
With online services such as you Yahoo mail, Gmail, and Facebook , you can use the "Forgot Password" or "Reset Password" feature to receive a password reminder or link to reset your password.