A-F = Auto-Focus.
Aperture = variable diaphragm "window" built-in to every lens.
B&W = Black & White (film)
Bokeh = background blur (I hate this term!)
bpc - bits per channel (Photoshop)
Bracketing = A set (usually 3 or 5) of exposures identical in every respect except shutter speed. Most often separated by 1-stop or 2-stops. Used in making a single HDR imaging, or to assure proper exposure in a difficult photography situation.
Camera lens focal lengths are usually specified in millimeters (mm). When a photographic lens is set to "infinity", the distance between its rear nodal (focal) point and the sensor is the lens' focal length.
CC = Constructive Criticism
CCD = Charged-Couple Device = http://en.wikipedia.org/wiki/Charge-coupled_device = sensor inside SOME camera.
CCD vs CMOS = http://en.wikipedia.org/wiki/Image_sensor#CCD_vs_CMOS
CMOS = Complementary Metal–Oxide–Semiconductor = http://en.wikipedia.org/wiki/CMOS = sensor inside MANY cameras.
CoC = Circle of Confusion = In photography, used to determine the depth of field, the part of an image that is acceptably sharp. A standard value of CoC is often associated with each image format, but the most appropriate value depends on visual acuity, viewing conditions, and the amount of enlargement. Properly, this is the maximum permissible circle of confusion, the circle of confusion diameter limit, or the circle of confusion criterion, but is often informally called simply the circle of confusion.
CS1, CS2, ... CS5, CS5.5 = PhotoShop versions (CS6 is coming soon)
DOF = Depth of Field (area in focus within photo).
DPI - Dots Per Inch (printer reference)
DSLR = Digital Single Lens Reflex camera
f-stop = measurement of aperture opening, expressed as a (f)raction, such as f/16. The bigger the number = the smaller the aperture.
HDR = High Dynamic Range = A set of techniques that allows a greater dynamic range between the lightest and darkest areas of an image than current standard digital imaging techniques or photographic methods. This wide dynamic range allows HDR images to more accurately represent the range of intensity levels found in real scenes, ranging from direct sunlight to faint starlight, and is often captured by merging (with an HDR computer program)of multiple, differently exposed standard-dynamic-range digital images of same subject.
HHCC = Hard Hat Constructive Criticism (meaning, mostly criticism, and less constructive)
IMHO = In my honest opinion (meaning anything I said previously was not honest) or "humble opinion" (labeling self as humble?)
IMO = In my opinion
ISO (International Standards Organization) = old ASA (American Standards Association) = measurement of CCD or CMOS or film sensitivity to light. The higher the ISO = increased sensitivity to light (good) = increased noise (bad).
JMO = Just my opinion
LR, LR2, LR3 - LightRoom versions
MF = Manual focus
MFD = Minimum Focusing Distance (between lens front element to subject).
Noise = electronic aberrations (mis-fired pixels) occurring on CCD or CMOS sensor.
OCF = Off Camera Flash
OOF = Out of focus
P&S = Point & Shoot camera
Pixel = a single microscopic sensor, to capture light and color, within CCD or CMOS. A 12M sensor has 12-million pixels.
PP = Post Processing
PPI - Pixels Per Inch (CMOS sensor reference)
PSE1, PSE2,. . . = PhotoShop Elements - latest version 10
Reversing Ring = a ring that has camera body attachment mount on one side, and is threaded on the other, to mount on your lens where you normally mount your filter. A lens mounted in reverse position dramatically increases magnification, but loses all automated function. Manual focus and manual adjustment of both aperture & shutter speed are required.
Slave = off camera flash
SLR = (film) Single Lens Reflex camera
SOOC = SOTC = Straight out of (the) camera
VR (Nikon) = Vibration Reduction = IS (Canon) = Image Stabilization = VC (Tamron) = Vibration Control = OS (Sigma) = Optical Stabilization.
WD = Working Distance (between lens front element to subject).

OMG = I dropped my camera!