usi M9000 - Display; Keyboard - Touchpad Drawer

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1.4.2 Display
A display is used to provide a visual interface to the local DME system user. These devices are
available from several manufacturers. This is an optional component of the DME system.
1.4.3 Keyboard – Touchpad Drawer
An optional keyboard/touchpad drawer is used to provide manual input to the DME system from
the local user.