Remember: the outer tall bars are framing bars which you ignore. The bars in a Postnet bar code come in groups of five bars (three short and two tall). Each group of five translates to a digit as follows:

1: ...||          
2: ..|.|         
3: ..||.      
4: .|..|          
5: .|.|.       
6: .||..       
7: |...|        
8: |..|.         
9: |.|..       
0: ||...

Homework: Decode the first seven postnet bar codes on this worksheet.