This MINIATURE-GLOSSARY give a very short describtion of terms used in coherence with digital photographing and CHDK, detailed informations can be found e.g. in the Wikipedia.
AEB
Automatic Exposure Bracketing
ARM
Architecture for microprocessors
Bayer filter
a color filter array for arranging RGB color filters on a square grid of photosensors in digital cameras
Bracketing
a general technique of taking several shots of the same subject using different or the same camera settings
CMOS
Complementary Metal-Oxide-Semiconductor, a class of integrated circuits, used in microprocessors, microcontrollers, RAM and other digital logic circuits, also used for a wide variety of analog circuits
CMYK
short for cyan, magenta, yellow, and key (black), a subtractive color model used in color printing & to describe the printing process itself
CRT
Cathode Ray Tube, a vacuum tube containing an electron gun (a source of electrons) and a fluorescent screen, the mean part of a TV or a monitor
Dark frame subtraction
a way to minimize image noise for pictures taken with long exposure times; it works by taking a picture with the shutter closed, then this “dark frame” is subtracted from the picture
DigiC
an image processor developed by Canon for cameras, video cameras and webcams; based on ARM architecture
DNG
Royalty free RAW image format designed by Adobe Systems
DPOF
Digital Print Order Format, a format for digital camera to define which captured images on the storage card are to be printed
DryOS
an Operating system from Canon for digital cameras and other Canon hardware, such as digital video cameras and high-end webcams
DSLR
Digital Single-Lens Reflex Camera, camera with an automatic mirror system
EXIF
Exchangeable Image File Format, a specification for the image file format used by digital cameras
FAT
File Allocation Table, a computer file system architecture from Microsoft
HDR (HDRI, DRI)
High Dynamic Range (Imaging), a technique that allows a greater dynamic range of exposures (the range of values between light and dark areas)
IDA
Disassembler software
IS
Image Stabilizer
ISO
International Organization for Standardization, an scale for measuring color-negative film speed
JPEG (JPG)
Joint Photographic Experts Group, a method of compression for photographic images, media type format
LUA
A script programming language
ND filter
Neutral Density filter, "grey" filter on cameras
NTSC
National Television System Committee, the analog television system used in the United States, Canada, Japan, Mexico, the Philippines, South Korea, Taiwan
OSD
On Screen Display
PAL
short for Phase Alternating Line, a colour encoding system used in broadcast television systems, e.g. in europe
RAW
Unprocessed photo file / format
RGB
short for Red, Green, Blue, an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors
VxWorks
an operating system from Wind River, licensed by Canon for many of their cameras