Quantizing is the process of assigning values to waveform samples by comparing the samples to discrete steps.
Quadrature Encoder
Quadrature encoder, a type of rotary encoder, produces two outputs 90 degrees out of phase. By counting transitions of these outputs, a computer can decode the shaft's position and its direction of motion.
QWERTY Keyboard
QWERTY keyboard refers to the arrangement of keys on a standard English computer keyboard or typewriter.
QXGA: Quantum Extended Graphics Array
Quantum Extended Graphics Array (QXGA) is a display specification that is capable of supporting 2048 x 1536 resolution, or approximately 3.2 million pixels with a 4:3 aspect ratio. As of 2005, this is the highest non-experimental and non-widescreen resolution, and there are very few devices that can render images at such high resolution.
QuickTime
Developed by Apple Computer, QuickTime is a method of storing sound, graphics, and movie files. If you see a MOV file on the Web or on a CD-ROM, you'll know it's a QuickTime file. Although QuickTime was originally developed for the Macintosh, player software is now available for Windows and other platforms. If you don't have a QuickTime player, you can always download versions for either Mac or PC from Apple's Web site.