In the early 1970s I remember seeing similer things for the PDP-10 and PDP-15.
On Mon Dec 3 07:02:18 2018 cctech at
classiccmp.org (Paul Birkel via cctech) wrote:
https://www.asc.ohio-state.edu/dunlap.3/humor/instruction.set.html
ERS Erase Read-only Storage
FPT Fire Photon Torpedoes
GCAR Get Correct Answer Regardless
XIO Execute Invalid Op code
Among others!
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