Author's Corrections, customer's corrections/changes made at the proofing stage.
Bleed, the printed image extends beyond the trim edge of a sheet or page.
Collating, arranging of printed sheets into the desired sequence.
Crop marks, marks at the edges of an illustration or photograph to indicate the portion to be reproduced.
DPI, dots per inch; measure for output resolution of various devices.
Four-colour process, reproduction of full-colour photographs or art with the four basic colours of ink (yellow, magenta, cyan, black).
Halftone, picture with shades of tone created by varying size dots.
LPI - Lines per inch, the coarseness of the dots used in shaded and halftoned areas.
Point, a measurement for the size of type, distance between lines and thickness of rules.