SAME is a copy style/properties operation; it modifies the selection to have the properties of the target.

AGAIN repeats the previous operation on the current (presumably new) selection.

KEYBOARD brought up an on-screen keyboard for special characters.

MOVE moved the current selection to the target location, and COPY duplicated the current selection at the target location. There was no invisible clipboard. [also previously edited into my comment below]

See The star user interface: an overview which is now happily free: https://dl.acm.org/doi/10.1145/1500774.1500840