* '''GX4000'''
* Has only one "key" (the || Pause button, aka "P" key)
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== Mechanics ==
[[File:NoPicture.png|100px|left]]
* '''Early 464 with PCB (non-membrane) keyboard'''
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[[File:NoPicture.png|100px|left]]
* '''Normal 464 with membrane keyboard'''
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[[File:NoPicture.png|100px|left]]
* '''Later 464 with "flat" keyboard'''
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