I thought I recalled a thread on this in the past, but Searchy didn't turn it up.

The question is: what are all the know branches of the Imperial Adeptus.

Off the top of my head, I know of:
  • Adeptus Astartes
  • Adeptus Ministorum
  • Adeptus Mechanicus
  • Adeptus Arbites
  • Adeptus Astra Telepathica
  • Adeptus Astronomica
  • Adeptus Custodes
  • Officio Assassinorum (is this part of a bigger one?)
What are we still missing?