VDO Cyclecomputing C4 Instruction Manual page 24

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2.6 The VDO EMC-operating system
EMC = Easy Menu Control
EMC eases operating the computer by a full text menu control well known from
most cellular phones. 4 keys combined with the 4-line display provide comfortable
and user-friendly operation.
Menu indicators will always show further menu options by flashing.
In fact, you do not need the manual any more form here. Your VDO computer leads you step
by step through all the menus.
Enjoy navigating!
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CYCLECOMPUTING