Probably explain it by..
Building a inner Site AJAX
Starting a Major wordpress Mods2, and adding new plug-ins, scratch code.
Building other Network for games on top.
Server CrimeWars : Source ds src server network.
Lumberyard: W&W: Destruction Alert – add servers linux someday, maybe on PI.
Blender PI Network. PI Co-location style networking program.
Other Applications for Ease of use,.