Interleaved 2 of 5

Interleaved 2 of 5 is a bar code format used to encode numeric data using two bar widths. Two out of every five bars is wide, giving the format its name.

This format has been used on film cases, product packaging, and on encapsulated coins graded by the PCGS service.

Developer libraries

 * ZBar bar code reader library: cross-platform
 * zxing (Zebra Crossing) (barcode library for Java, ported to some other systems)