Jacket
The paper cover of hardbound book, sometimes called the “dust cover.”
Job Number
A number assigned to a printing project used for recordkeeping and job tracking. Also used to retrieve old jobs for reprints or reworking by customer.
Jog
To vibrate a stack of finished pages so that they are tightly aligned for final trimming.
Jogger
Vibrating, sloping platform that evens up the edges of stacks of paper.