- like the UPC code on a package, or, the newer 2D bar codes, or both.

The newer 2D bar codes look like this :

The 2D bar codes have a lot more capacity, so they may include a link to a website, or a coupon, or personal contact information - name, address, phone number. 

Not only can 2D bar codes be printed, but most cell phones can read them from a computer monitor.    If your phone read the 2D bar code above, you probably found a secret

message about where you could create your own personal 2D bar code for free!

Do you need a free barcode reader for your cell phone?   Visit our Helpful Links page for several companies that offer them.