[MrB (Simon)]

A
AAO.......Anglo-Australian Observatory Link
AAT.......Anglo-Australian Telescope Wikipedia
ACF.......Advanced Coma Free (Meade brand)
AFAIK.....As Far As I Know
AFOV......Apparent Field Of View Link
AGWA......Astronomical Group of Western Australia
ALT.......ALTitide Wikipedia
ALT-AZ....Altitude-Azimuth (Mount) Wikipedia
AN........Argo Navis (Brand) Link
AN........Constellation Wikipedia
AO........Adaptive Optics Wikipedia
AOE.......Aquila Optical and Electronics (Retailer) Link
AP........AstroPhoto(graphy)
AP........Astro-Physics (Brand) Link
APO.......APOchromatic Wikipedia
APOD......Astronomy Picture Of the Day (Website) Link
AR........Active Region (solar astronomy) Wikipedia or....
AR........Anti-Reflection (Lens coating) Wikipedia
AS&T......Australian Sky & Telescope (Magazine) Link
ASCOM.....Astronomy Common Object Model (Equipment driver) Link, Wikipedia
AST.......Australian Sky & Telescope (Magazine) Link
ASWA......Astronomical Society of Western Australia
ATM.......Amateur Telescope Makers
ATS.......Advanced Telescope Supplies (Retailer)
AU........Astronomical Unit wikipedia
AZ........AZimuth Wikipedia

B
BD........Black Diamond (SkyWatcher Brand) Link
BTW.......By The Way

C
CA........Chromatic Abberation Wikipedia
CAT.......CATadioptric (Telescope) Wikipedia
CCD.......Charge Coupled Device (Camera sensor) Wikipedia
CMOS......Complimentary Metal-Oxide Silicon/Semiconductor (Camera Sensor) Wikipedia
CN........Cloudy Nights (Forum) Link
CWAS......Central West Astronomical Society Link

D
DEC.......DEClination Wikipedia
DK........Dall-Kirkham (Telescope) Wikipedia
DMK.......? Camera (Imaging Source Brand) Link
DOB.......DOBsonian (Mount) Wikipedia
DPP.......Digital Photo Professional (Software) Link
DSI.......Deep Sky Imager (Orion Brand) Link
DSLR......Digital Single Lens Reflex (Camera) Wikipedia
DSO.......Deep Sky Object Wikipedia
DSS.......Deep Sky Stacker (software) Link or....
DSS.......Digitized Sky Survey Link, Wikipedia
DST.......Daylight Saving Time Wikipedia

E
ED........Extra-low Dispersion (Camera/Telescope lens) Wikipedia
EF........Electro-Focus (Canon Lens) Wikipedia
EOI.......Expression Of Interest(IceTrade Forum)
EOS.......Electro-Optical System (Canon Cameras) Wikipedia
EP........Eye Piece (Ocular) Wikipedia
EP........Equatorial Platform
EQ........EQuatorial (Mount) Wikipedia
ER........Eye Relief
ES........Explore Scientific (Brand)
ESA.......European Space Agency Link, Wikipedia
ESO.......European Southern Observatory Link, Wikipedia