LK421
The LK421 was a detachable computer keyboard manufactured by
Digital Unix line of operating systems, instead of the OpenVMS
operating system for which the LK401 was more suitable.
The keyboard is notable for the standard position of the
Escape key. The keyboard has two compose keys
. There is no separate numeric keypad or edit key group. The functionality of the missing keys is implemented by some standard keys having a dual function. The user holds down the Extend key and presses the key with the appropriate legend on the front of a standard key to access the additional functions.
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