Watermark
distinctive design created in paper at the time of manufacture that can be easily seen by holding the paper up to a light
With the grain
folding or feeding paper into the press or folder parallel to the grain of paper
Work and tumble
using the same plate and same guide, printing one side of a sheet, and flipping it from gripper to tail to print on the back of the sheet. Similar to perfecting but 2 passes
Work and turn
using the same plate and common guide, printing one side of a sheet, and flipping it from left to right to print on the back of the sheet
WT
work and turn (see work and turn definition)
WTUM
work and tumble (see work and tumble definition)