Many years ago my (then) teenage son was field testing an early version of a temporary website intended to encourage young people to choose a career in tax. It included a list of the various professional bodies - which were identified only by their initials.
My son asked the question: "What's a Kyott? an I - cow, an Acker and an Eye-Kas?"
All those involved with the project used abbreviations all the time. But we'd forgotten that many in our audience would have no idea what the letters stood for. Following the initial feedback we spelled them all out in full.
More recently someone asked the then President of the Chartered Institute of Taxation why they preferred to be known as "See, Eye, Oh, Tee" rather than "See-ott". The emphatic reply apparently was that "See-ott sounds terrible". Indeed. But better than "Ky-ott" which was how my son had tried to pronounce the letters!
The other words in the title above refer to ICAEW, ACCA and ICAS.
Postscript: A related story I posted on this blog last year: The same professional surname