🚀 go-pugleaf

I'd have to say the king of TLA's is probably Control Data.  Their
assembler for their 6600 and greater machines had sort of TLA's:
the first char was operation the second was a register type and the
third was register number (e.g.  BX1    X2+X3   (add x2 to x3 result
in X1)).  Worse than that the archetecture of the machine (big
sucker main processor with a bunch of PDP-8 class machines called
peripheral processors) had the function call to a peripheral processor
be to load the name of the program in its input register then the PP
would go to disk load the requested program and execute it.  Unfortunantly
the program name was 18 bits long (3 6 bit characters).  So all the
PP function codes in the operating system were 3 char long (always 
acronyms for 3 words which seemed to be in the form adjective adjective 
noun)  Examples:  PFM (Permanent File Manager),  CPM (Control Point 
Manager)...  

And since this scheme worked so well for the guts of the OS all 
the rest of the system code seemed to be named similarly.