PLU stands for price look-up code.
The sticker you find on your produce has the PLU# on them.
examples: #4132 or #3122 – since they start with a 4 or a 3
it usually means they are conventional.
#95548 – since it starts with a 9 it usually
means it is organic.
#86534 – since it starts with a 8 it usually
means it is genetically motified.
It helps the grocery store identify their produce. It also
is used to ring your produce up when checking out of the store.