RPI had the usual variations to these gag opcode lists floating around too.
I don't know where I put my hardcopy, but the ones that stick in my mind are:
ECB Eject chad box
EDI Eject disk immediate
HCF Halt and Catch Fire (this was already posted here, but I liked the fact
that the RPI list emphasized the fact that it requires privilege)
I wish I knew where that printout was (IIRC the file was named ACM.:WORDS and
was cobbled together from various scraps, probably mostly from the outside
world), there was a lot of other nice stuff, of interest only to "power" nerds.
John Wilson
D Bit