datapacker is a tool to group files by size. It is perhaps most often used to fit a set of files onto the minimum number of CDs or DVDs.

datapacker is designed to group files such that they fill fixed-size containers (called “bins”) using the minimum number of containers. This is useful, for instance, if you want to archive a number of files to CD or DVD, and want to organize them such that you use the minimum possible number of CDs or DVDs.

Categories (in the haskell sense) generalize functions (you can compose them but not apply them)