[GUIDE] Everything Explained

This is comes from the HTC One M8 threads, but it will give you a general knowledge about some of the HTC basics
http://forum.xda-developers.com/showthread.php?t=2744194
even if not entirely complete, and a bit rough around the edges, it should be able to get you more familiarized with HTC
do NOT flash any link from that thread, since it's meant for the the HTC One M8