HP 455 Notebook-PC - Manual (Page 19)

Keys
Component Description
(1) esc key Displays system information when pressed in combination
with the
fn key.
(2) fn key Displays system information when pressed in combination
with the
esc key.
(3) Windows logo key Displays the Start screen.
(4) Action keys Execute frequently used system functions.
(5) Windows applications key Displays options for a selected object.`
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