Hi.....anyone here knowledgeable on the subject? TIA
What kind of codes, do you mean the bar codes on products. As far as I know it is product information, color, size, price, etc..
Ive read online about the bar codes and what they mean.
There might be, or might be able to find out some things for you, if you gave some idea what you wanted to know. If it's just a survey, I guess I know some things about some coupons and codes, but much comes to how you define "knowledgeable".