FBI's Glossary of Internet Terms

In response to a Freedom of Information Act request, the FBI recently released a glossary of Twitter (Internet) slang that it provides to its agents.  Links to reporting on the glossary are here.

The list is voluminous and hard to read so I only skimmed it, coming across:

Acronyms with multiple meanings that are bound to leave agents guessing, such as:

DOS = Dozing off soon; Dad over shoulder; Disk Operating System

others that seem difficult to imagine arising often in an online world 

DPYN = Don't Pick Your Nose

and helpful explanations of obscure meanings

HAN = alone (Han Solo)

Whatever its shortcomings, one can envision judges and litigants consulting this list to decipher the text messages, internet chats, etc., they increasingly confront in modern litigation.