Having had to change an entire document from AAR to AR and back again to AAR, I wish whichever idiot came up with the 'AR' notion to have his hairy regions infested with plague-ridden fleas!
Still, I did at least get paid to change it all. Twice in fact!
Then there's MRTT. All them Airbus promotional stuff refers to Multi Role Tanker Transport. So that's what my work used - and that's what the OzAF use as well. But not the GAF....someone in the BWB decided "Nein". Because the existing GAF A310 MRT is a multi-role transporter, so the modified aircraft will be a multi-role transport tanker..... So, for the A310 MRTT it's 'Multi Role Transport Tanker' - but for the RAAF A330 MRTT it's 'Multi Role Tanker Transport'....
More work changing it around again!
You'd be amazed how anal some people get over acronymish....
And for the RAF's FSTA it's.........a deafening silence.