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This dictionary covers graphic design, prepress and print terminology.
Stan Schwartz supplied most of the terms of this online glossary.

A-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z

QC

Abbreviation for Quality Control.

QIC

Abbreviation for Quarter Inch Committee, committee defining standards for tape-backup units that use quarter inch wide tapes.

QR barcode

Abbreviation for Quick Response code.

quad

A square space the size of an em that was used in lead typesetting to space out a line to its full justified width so that each letter was held in place when the frame was moved. For example, to quad right, the typesetter placed all the quads on the left side of the line to push the type to the right. Used in photographic typesetting as a placement term. Originally a piece of type metal used to fill out lines and spacing between words.

QuarkXPress

One of the most popular layout applications on the market

quadding

The process of aligning type, as in quad left, quad center or quad right.

quad center

To align a line of type in the center of the preset line length, with an equal amount of space on the left and right hand sides.

quads

A term used in the colour prepress trade to refer to the four separated films, cyan, magenta, yellow and black.

quartertone

Picture tonal values produced with dot size percentages of approximately 25 percent dot area.

queue

A list of files that are stored on a computer, waiting to be printed.

QuickDraw

The graphics model that is used by applications to generate the screen display on the Macintosh running MacOS. The native file format used to store QuickDraw graphics is called PICT. In OS X, QuickDraw was replaced by a technology called Quartz, which is based on PDF.

quick printer

A printer who specializes in quick turnaround and smaller runs, though the difference between a quick printer and a commercial printer is getting less distinct.

Quick Response code

A QR or Quick Response code is a two-dimensional barcode. Originally this technology was created for tracking parts in manufacturing processes. Nowadays it is alsoused for adding web links to a printed page. When you scan such a QR bar code using a web cam or mobile phone camera, the QR reader application takes you to a Web site, a YouTube video or some other web content. QR codes are an easy way of sending people to a site without having to type a URL. Below is the QR code for http://www.prepressure.com.

quire

1/20th of a ream (25 sheets).