Java A multiplatform, high-level, object-oriented programming language.

JDF (Job Definition Format) A data exchange standard that will act as a universal electronic job ticket that contains control data from print buying through estimating, customer service, prepress, press, finishing, and dispatch. JDF contains production information rather than content data. See CIP4.

Jog To align sheets of paper into a compact, even pile.

JPEG (The Joint Photographic Experts Group) was formed to create a standard for color and gray scale image compression. JPEG describes a variety of algorithms (rules), each of which is targeted for a specific type of image application. JPEG is the default format for most digital cameras. JPEG 2000 is the latest version. Compressing a JPEG file, that is already compressed, will affect quality adversely.

Justify In composition, to space lines uniformly to line up left and right. The opposite is ragged right composition.