Raster Image Processor
Device that translates page description commands into bitmapped information for an output device such as a laser printer or imagesetter.

Ream
500 sheets of paper.

Recycled Paper
New paper made entirely or in part from old paper.

Register
To place printing properly with regard to the edges of paper and other printing on the same sheet. Such printing is said to be in register.

Register Marks
Cross-hair lines on mechanicals and film that help keep flats, plates, and printing in register. Also called crossmarks and position marks.

Reprographics
General term for xerography, diazo and other methods of copying used by designers, engineers, architects or for general office use.

Resolution
Sharpness of an image on film, paper, computer screen, disc, tape or other medium.

RGB
Abbreviation for red, green, blue, the additive color primaries.

Round Back Bind
To casebind with a rounded (convex) spine, as compared to flat back bind.

Ruleup
Map or drawing given by a printer to a stripper showing how a printing job must be imposed using a specific press and sheet size. Also called press layout, printer's layout and ruleout.