IBM Aptiva 2198, Reference Manual

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Using passwords
You can use passwords to provide security for your computer and data. You
can set two kinds of passwords through the Configuration/Setup Utility
program: a power-on password and an administrator password. You do not
have to set a password of either type to use your computer. However, if you
want to use a password, read the following sections to become familiar with
both types of passwords before you set one.
Using a power-on password
The power-on password feature deters unauthorized persons from gaining
access to your computer. When you set the power-on password, you can
choose one of two password prompt modes:
Off In password prompt Off mode (sometimes referred to as
unattended start mode), you are not prompted to enter your
power-on password when you turn on the computer. The
computer starts the operating system, but the keyboard remains
locked until you type your power-on or administrator password.
The mouse (if attached to the mouse port) remains disabled,
even after the password has been typed. This mode is
designed primarily for environments where programs are run
unattended or from a remote location over a network.
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Aptiva Reference Guide