RANDOM ACCESS MEMORY Also called RAM. Retrievable computer
memory accessible at will without sequential reading.
RANGEFINDER The ground glass in a camera used to focus an image.
RASTER-BASED An image based on the manipulation of a matrix of
pixels or dots.
RASTER IMAGE PROCESSOR Also called RIP. A device for
converting vector-based imagery to high resolution raster images.
READ To access electronically stored data.
REAR PROJECTION SCREEN A matte surface, translucent screen used
when projecting an image from behind to a screen.
REBOOT Restart the computer system.
RECEDING COLORS Colors that appear to move away or create the
illusion of distance.
RECTANGULAR COORDINATE GRAPH A graph based on a grid
system where values are plotted by X and Y coordinates.
REFERENCE NUMBERS Numbers used on one drawing to refer to
another drawing for further details.
REFERENCE PLANE The normal plane used to reference all information.
REGISTER To align a page or any elements of an image or impression to
match the position of successive impressions.
REGISTER MARKS Marks used to key an overlay to a drawing or
mechanical as in color separation or combination plates.
REMOVED SECTION A drawing of the internal cross section of an object
located near the basic drawing of the object.
Continued on next page