barcode symbology

["Mayer, Debra" <dmayer@ETOWN.K12.KY.US>]

I have a choice of which barcode symbology to use with my new software:
codabar or Code39. I want to choose the most versitle or popular. Which one
would you recommend?
TIA
Debra Mayer
Elizabethtown High School
Elizabethtown, KY
dmayer@etown.k12.ky.us

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