Quartz Extreme
The window system in Apple's MacOS X which uses the PDF format as a basis.


Queue
Waiting loop in the managament of computer networks, arising frequently when several print jobs arrive bevor the earlier ones are finished.


QuickDraw
Part of the Macintosh operating system which is responsible for the display and functionality of the graphical user interface (menu bars, folders, buttons, recycle bin...)





Quicktime
Quicktime is a video format by the Apple company. File extension is .mov.