Quality Factor
A multiplication factor (between 1 and 2) applied to output screen ruling to calculate scanning resolution for optimum output quality. This is also known as the halftoning factor.

Quarter Tones
Tones between shadow and midtones are known as 3/4 tones and those between highlight and midtones are known as 1/4 tones.

Query
The process by which a web client requests specific information from a web server, based on a character string that is passed along.

QuickTime
A file extension for videos or "movies" (like animations) compressed using their QuickTime format.
   
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