Sam4s SER-7000 Manual page 231

WLU
WLU stands for Window Look Up. A WLU pops up and displays a list of items on the
operator screen. Three types of items that can be found on a Window Look-Up (WLU):
condiments, functions, and PLUs.
Typically, a WLU is used to display a list of instructions or choices associated with an item.
A WLU can be linked to a subsequent WLU in order to prompt an operator through a
sequence of selections. The default capacity of each WLU is 28 items; the maximum
capacity is 50 items.
SER-7000 Program Manual Glossary of Terms 225