Pentax *ist IST DS - Manual (Page 194)

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Appe
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Glossary
AdobeRGB
Color space recommended by Adobe Systems, Inc. for commercial
printing. Wider range of color reproduction than sRGB. Covers most of the
color range so colors only available when printed are not lost when editing
images from a computer. When image is opened by non-compatible
software, the colors look lighter.
AE Metering
Brightness of subject is measured to determine exposure. In this camera,
select from [Multi-segment Metering], [Center-weighted Metering] and
[Spot Metering].
Aperture
The aperture increases or reduces the light beam (thickness) that passes
through the lens.
Auto Bracket
For automatically changing the shooting conditions. When the shutter
button is pressed, three images are shot. The first one has no
compensation, the second is under-exposed and the third is over-
exposed.
Camera Shake (Blur)
When the camera moves while the shutter is open, the entire image
appears as if flowing. This occurs more often when shutter speed is low.
Prevent camera shake by raising the sensitivity, using the flash, and
raising the shutter speed. Alternatively, use a tripod to stabilize the
camera. Because camera motion causes camera shake, use the self-timer
to prevent.
CCD (Charge Coupled Devices)
Photography element which converts the light entering through the lens
into electric signals.