You might want to print this out and post in near your monitor.


AE – Automatic Exposure
AE-L – Automatic Exposure Lock
AF – Autofocus
AF-A – Area Autofocus (Nikon)
AF-C – Continuous Autofocus (Nikon)
AF-S – Single Autofocus (Nikon)
AFS – Silent Autofocus
AV – Aperture Priority (Canon)
A – Aperture Priority (Nikon)
B
B – Bulb
BIF – Bird in Flight
B&W – Black and White

C
CF – Compact Flash (a memory card format)
CMYK – Cyan, Magenta, Yellow Black
CSC – Compact System Camera
CWB – Custom White Balance
D
DOF – Depth of Field
DNG – Digital Negative Graphic
DPI – Dots per Inch
DSLR – Digital Single Lens Reflex
DX – Crop Sensor Format
E
EC – Exposure Compensation
ED – Extra Low Dispersion Glass
EF – Electronic Focus
EF – Canon Full Frame Sensor Format Lenses
EF-S – Canon Crop Sensor Format Lenses
ETTR – Expose to the Right
ETTL – Expose to the Left
EV – Exposure Value
EVF – Electronic Viewfinder
EXIF – Exchangeable Image File Format

F
FF – Full Frame
FOV – Field of View
FPS – Frames per Second
FX – Full Frame Format

G
GB – Gigabyte
GIF – Graphics Interchange Format
H
HDR – High Dynamic Range
HFD – Hyperfocal Distance
HSM – Hyper Sonic Motor (the same as USM, but for Sigma)
HSS – High Speed Sync
I
IF – Internal Focusing
IPTC – International Press Telecommunications Council
IR – Infrared
IS – Image Stabilisation
ISO – International Standards Organisation
IQ – Image Quality
J
JPG or JPEG – Joint Photographic Experts Group
K
KB – Kilobyte
L
LCD – Liquid Crystal Display
LED – Light Emitting Diode
LR – Adobe Lightroom
LTE – Long Time Exposure



M
M – Manual
MB – Megabyte
MF – Manual Focus
MLU – Mirror Lock-up
MUP – Mirror Lock-up (Nikon)
MP – Megapixels
MS – Memory Stick
N
ND Filters – Neutral Density Filters
NR – Noise Reduction
O
OCF – Off Camera Flash
OCR – Optical Character Recognition
OEM – Original Equipment Manufacturer
OOC – Out of Camera
OOF – Out of Focus
OS – Optical Stabilisation or Operating System
OVF – Optical Viewfinder
OZ – Optical Zoom
P
P – Programmed Autoexposure
PNG – Portable Network Graphics
PP – Post Processing
PPI – Pixels per Inch
PQ – Picture Quality
PS – Adobe Photoshop
PSE – Adobe Photoshop Elements
Q
R
RGB – Red, Green, Blue
S
SD – Secure Digital (a memory card format)
SDHC – Secure Digital High Capacity (a memory card format)
SLR – Single Lens Reflex (same as DSLR, but referring only to film cameras)
SP or S – Shutter Priority
sRGB – Standard RGB Colour Space
SS – Shutter Speed
SWM – Silent Wave Motor


T
TB – Terabyte
TC – Teleconverter
TIFF or TIF – Tagged Image File Format
TOG – Photographer
TTL – Through the Lens
TV – Time Value (Shutter priority mode for Canon and other brands)
U
USB – Universal Serial Bus
USM – Ultra Sonic Motor
UWA – Ultra Wide-angle
V
VR – Vibration Reduction
W
WA – Wide-angle
WB – White Balance
X
XQD – XQD (a memory card format)
Y
Z