Jog: To shake a stack of papers, either on a machine or by hand, so that the edges line up. Also referred to as knocking-up.
JPEG: A standardized image compression mechanism. One of the two most common types of images used on the World Wide Web, the other being GIF. JPEG is named after the Joint Photographic Experts Group, the original name of the committee that wrote the standard. The shorter JPG (without the E) extension/version is usually used only in association with PC platform file.
Justified: When type is justified, both margins (left and right) are even and straight.