S & D
From Scientolipedia
1. As a process is done exactly by the general rules of listing. One lists for persons or groups who are or have suppressed the pc. The list is complete when only one item reads on nulling and this is the item. (HCOBHubbard Communications Office Bulletin (technical bulletin) Also colloquially referred to as "red on white" HCOB's are always red ink on white paper.
24 Nov 65)