on 02-21-2013 07:38 PM
If the software is on discs or readable, it's eligible. Media Mail is not just for printed materials, it even includes film, piano rolls and educational charts! Here's the section:
on 02-21-2013 07:37 PM
The previous answer is incorrect. Media Mail is obviously for more than just books and printed material.
Here is the USPS official info:
It appears that computer software doesn't qualify.