Boxes, generally speaking, are involved in phreaking. They do many differant things and are easy to tell the differance by name color.
They all do differant things, you'd have to look up the type of box to get what it does, theres literally thousands of differant types.UGN Security
's Archive will have a boxes section which will be heald apart from the standard hacking/phreaking areas since some boxes dont really involve phreaking or hacking.
This section should be up tonight with some basic boxes, i'll be sure to have up about 30 boxes for you to just poke through.