I used to work in the Australian Department of Defence. It was not a good idea when they 'downsized' the tiny little department that had ONE JOB - making sure that nobody duplicated somebody else's acronym.
A new Director took over in the Defence Legal Office (DLO), and decided that he had to do something to 'stamp his ownership' on the directorate. He decided to change the name to the Defence Legal Service (DLS), presumably because he thought it sounded better.
Unfortunately, there was already the Defence Library Service (DLS) and they discovered that this was now a problem when the library and the lawyers started getting each others' mail.
The director was stubborn and refused to change the name back. Instead, he insisted that the 'The' at the beginning of the directorate's name should be included in the acronym (something that you do not do with acronyms
, dangit!!!!). They became The Defence Legal Service (TDLS).
This is why everyone in the Australian Department of Defence now refers to their legal specialists as 'Tiddles'.