TTT Terminology
KOS
KOS is the abbreviation of Kill On Sight and simply means to kill them if you see them.
For example, someone says “KOS Johnny” if you see the player named “Johnny” you may kill them.
RDM
RDM is the abbreviation for Random Death Match and simply means you killed or tried to kill someone without a valid reason. For example player “X” has been damaged, player “Y” then kills him because of his lack of health. That would be RDM and it is punishable. There is no such thing as ARDM as attempted RDM is still just RDM, the reason for this can be read above as well (RDM simply means you killed or tried to kill someone).
LTAP
LTAP is the abbreviation for Leaving To Avoid Punishment. Which is quite self-explanatory, if you leave the server before you can be punished, the handling staff member may and most likely will give you a harsher punishment. For example, player “Y” kills player “X” without a valid reason. Player “X” reports player “Y”, then player “Y” leaves the server before the report has been handled, that would be RDM + LTAP.