emacs terminology

[Luca Ferrari]

Hi all,
this could sound like trolling, but I'm really curious to understand
(if possibile) how did Emacs come up with terms like "kill" and
"yank".
Is there any resource that explains it? I suspect that was due in
order to "memorize" key bindings, e.g., C-p was already used for
"previous" so instead of "paste" they choose "yank", but I'm just
guessing.

Thanks,
Luca