Dispense As Written (DAW)

The other day I got a prescription, and on it was a note to the doctor "IF you don't want this prescription substituted with a generic, write DAW in the box below" I thought it odd, but the doctor is French, so I figured it may be a French word, even though it looks more German than French. Today I just found out that D.A.W. stands for "Dispense As Written", ie. don't substitute a generic.