The terms 'login' and 'logout' refer to the process of entering or exiting a computer system or website. When you 'login' to a computer, you enter your username and password to gain access to the system or network. This allows you to use programs, access files, or perform other tasks that require authorisation.

When you are finished using the computer or network, you can 'logout' to securely exit the system. This ensures that other users cannot access your account or information.

Logging in and out is an important security measure to protect your information and prevent unauthorised access to a computer or website.