Fujitsu Siemens Computers Fujitsu-Siemens PC - Manual (Page 76)

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keypad, it is possible to toggle between cursor movement and the
input of numbers.
The CAPS LOCK key < >
This key is used to enter upper case letters. If this key is engaged,
the central LED ("Caps Lock" / "< >" / "A") is illuminated on the
keyboard. Pressing the CAPS LOCK key again reverses the lock
(depending on the operating system).
The <Alt> key
The function of this key is program-dependent. It is always used in
connection with other keys. Like the SHIFT key, when pressed
alone it generally has no function. In the operating system as well
as in many programs, special characters which cannot be found on
the keyboard can be entered with the aid of the ALT key and
commands can be generated.
The <Alt Gr> key
This key is used to enter the special characters shown on some
keys as a third option. E.g. if you wish to enter the "\" character,
hold down <Alt Gr> while also pressing the <ß> key.
The <Ctrl> key
This key is a control key. Like the ALT key it is only active in
combination with other keys. Its meaning varies from program to
program.
The <Esc> key
This is program-dependent. When working in the operating system,
the current prompt entered in the command buffer will be deleted.
Windows-specific keys:
These keys only exist on a Windows keyboard as they support
Windows-specific functions. The keys are:
1 stkey: between <Ctrl> and <ALT>, left side
2ndkey: between <Alt Gr> and <Ctrl>, right side next to <Alt Gr>
3rdkey: next to 2nd key