In computer security, logging (or signing) in an out is the process by which individual access to a computer system is controlled by identification of the user in order to obtain credentials to permit access. It is an integral part of computer security. A user can log in to a system to obtain access, and then log out when the access is no longer needed. Note that the term log in (a verb) is two words, while login (a noun referring to the procedure, credentials, or form used) is one word; the same applies to log out and logout.