Very deep multiply nested acronyms
SECS: no, this is not just a misspelling designed to get your attention, but one of a flock of responses to our request for nested acronyms or initialisms (5 June).
Dawn Bradford reports that it stands for SEMI (Semiconductor equipment manufacturing industries) equipment communication standard. Some machines she worked on conformed to one or other of the two "levels" set out in the standard. Others did not need to communicate, so neither level applied. This led to the list on her wall headed "SECS I", "SECS II" - and "British", in homage to the theatrical comedy No Sex Please, We're...
As Keith Sewell reminds us, the military "love to partake in the [nested acronyms] fetish". He provides a rich seam of multiple nesting. Consider MAGERD, the MRCA AGE requirement document, in which MRCA stands for the multi-role combat aircraft and AGE for aircraft ...