The Core Utilities Stack, mostly console based softwares.
The baseline system
Tools and Utilities used into software development.
Several dialy software used to accomplish a Power and Graphical GNU/Linux
The projects used for Network communication, mostly are able to use his protocols to interlock with servers of p2p.
Script Language Stack
Whathever software able to music/video play
It's a list of software used to accomplish something. LAMP is an example.
You can have up to 30 stacks.