This being me
nick, I get asked this alot. Here's some I've discovered since:
   
Astronomical Unit - A unit of length used in measuring astronomical distances within the
solar system equal to the
mean distance from
Earth to the
Sun, approximately 150 million
kilometers (93
million
miles).
   
Angstrom Unit - a metric unit of length equal to one ten billionth of a meter (or 0.0001
micron); used to specify wavelengths of
electromagnetic radiation
   
Associate in Underwriting (
insurance)
   
Atomic Unit
    The Periodic Symbol for
Gold (
Au) - From the
Latin word aurum.
   
Arithmetic Unit
   
Auxiliary Unit
   
Alignment Unit
   
Analyzer Unit
   
Arbitrary Unit
   
Arellano University
   
American University
   
Anderson University
   
Aurora University
   
Auburn University
   
Angeles University
   
Andrews University
   
Anadolu University
   
Amman University
   
Air University
   
Adelaide University (
University of Adelaide, Australia)
   
Absorbance Unit
   
Access Unit
   
Autistic/
Autism
   
Author
   
Australia
    Australia's .au
top level domain
    The
music format with the
file extension .au
    "
Hey you"
    "
Ah woo"
    "
Ow"
   
Somebody's Intials
For me personally, it's not an
acronym or
initials. It's simply two capitol letters and pronounced as if it were.