Keylock; System Power Switch; Figure 1-5: Keylock And Two Security-Lock Keys - DTK Apex 386/33 User Manual

Keylock

The keylock enables or disables the keyboard. In the unlock mode the
keyboard is activated. In the lock mode the keyboard is disabled to
deny unauthorized users access to the computer.

Figure 1-5: Keylock and Two Security-Lock Keys

System Power Switch

The system power switch is located on the control panel.
You should always be certain that the power is turned off before
modifying the hardware configuration in any way.
Chapter 1: System Overview 9